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<title>freepatentsonline.com: Dynamic information storage or retrieval</title>
<link>http://www.freepatentsonline.com/result.html?query_txt=ccl/369%20and%20isd/11/10/2009&amp;uspat=on</link>
<description>USPTO Class 369 Dynamic information storage or retrieval</description>
<language>en-us</language>
<lastBuildDate>Tue, 10 Nov 2009 08:53:09 EST</lastBuildDate>

<item>
<title><![CDATA[Molecular optoelectronic memory device]]></title>
<link>http://www.freepatentsonline.com/7616551.html</link>
<description><![CDATA[Method for employing optical state-change organic polymer films as information-storage layers in optoelectronic, high-density memories, and high-density optoelectronic memories produced by the method. In certain embodiments, the optical state-change organic polymer films can be manufactured to exhibit two different, stable optical states, one transparent, and one light-absorbing and/or light-reflecting, that can be locally, stably, and reversibly induced by application of an electrical field. In various embodiments, information is digitally encoded in an information-storage layer as bits, the value of each bit represented by the optical state of an area of the information-storage layer corresponding to the bit. In various embodiments, the optical state of a small region of the information-storage layer can be determined by exposing the small region to visible light, and determining whether or not a photodiode layer in an information-storage medium below the information-storage layer generates an electrical current in response to illumination.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Focus search apparatus and method]]></title>
<link>http://www.freepatentsonline.com/7616537.html</link>
<description><![CDATA[Provided are a focus search apparatus and method for performing a focus search after moving an optical pickup to a focus-on point according to a signal output from a sine wave generator so that a stable and smooth focus search is performed. In the focus search method, a sine wave is generated in response to a focus search command. The focus search is performed using an optical pickup in response to the sine wave. The optical pickup is driven in response to an amplitude of the sine wave during the focus search and in response to a filtered focus error signal during a focus servo.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Method for setting layer-jump point on optical disc]]></title>
<link>http://www.freepatentsonline.com/7616538.html</link>
<description><![CDATA[A method for setting a layer-jump point on a multilayer optical disc in an optical drive for accessing the multilayer optical disc. First, a magnetic-pole cycle value is accumulated. Next, a lag control signal of the optical drive is detected to record the magnetic-pole cycle value as a magnetic-pole basic value. Then, a magnetic-pole offset value is generated according to a phase difference between the lag control signal and an oscillating position of the multilayer optical disc. Finally, a layer-jump-point reference value, according to which the optical drive moves from one layer of the multilayer optical disc to another layer thereof to access data, is set by adding the magnetic-pole basic value to the magnetic-pole offset value.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Optical recording medium, recording/reproducing apparatus and method, initialization method, and reinitialization method]]></title>
<link>http://www.freepatentsonline.com/7616542.html</link>
<description><![CDATA[A recording/reproducing apparatus includes a writing/reading unit writing data to or reading data from an information recording medium having an access control area in which access control data is recorded, the access control data having common information set to allow the recording/reproducing apparatus that cannot recognize a predetermined function adapted to the information recording medium to control access to the information recording medium; and a control unit controlling the writing/reading unit to record access control data regarding a function recognizable by the recording/reproducing apparatus in the access control area when the information recording medium is initialized or reinitialized.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Reading and writing of information blocks]]></title>
<link>http://www.freepatentsonline.com/7616546.html</link>
<description><![CDATA[A system writes and reads information blocks on a record carrier and generates status information which is indicative of the fact that at least one area of the record carrier has been written. The status information includes initial-area information which is indicative of an uninterrupted written initial area which extends from the start of a track pattern area intended for writing information blocks. The status information may be fixed on the record carrier.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[High-speed mixed analog/digital PRML data detection and clock recovery apparatus and method for data storage]]></title>
<link>http://www.freepatentsonline.com/7616547.html</link>
<description><![CDATA[A high-speed mixed analog/digital PRML data detection and clock recovery apparatus and method. The high-speed mixed analog/digital PRML data detection and clock recovery apparatus includes a variable gain amplifier, an analog equalizer, an analog-to-digital (A/D) converter, a DC offset remover, a level error detector, a Viterbi decoder, and an adaptive digital controller. The adaptive digital controller separately stores the level error values by predetermined frequencies, calculates predetermined coefficient values by each frequency component based on the level error values, and D/A-converts and applies the calculated predetermined coefficient values to the variable gain amplifier and the analog equalizer.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Optical pickup apparatus and optical disc apparatus]]></title>
<link>http://www.freepatentsonline.com/7616548.html</link>
<description><![CDATA[An optical pickup apparatus and an optical disc apparatus are adapted to raise the efficiency of utilization of the lasers of the apparatus for accurately detecting tracking errors by raising the intensity ratio of the beam of the 0-th order to the beams of the ±1st orders produced by splitting of the laser beam of the wavelength to be subjected to division by three. The optical pickup apparatus includes a light emitting section for emitting a first laser beam having wavelength λ 1  and a second laser beam having wavelength λ 2  different from the wavelength λ 1.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Method for changing access speed of an optical disk drive]]></title>
<link>http://www.freepatentsonline.com/7616530.html</link>
<description><![CDATA[Method for changing access speed of an optical disk drive, which is used to switch the optical disk drive with different access speeds, to provide the optimal mode for data access. The method places an RC circuit between the electrical circuits and one of the buttons of the disk drive. Pressing the control button varies the input voltage of the control circuit and the control circuit changes the work speed of the optical disk drive motor.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Method for determining track searching direction]]></title>
<link>http://www.freepatentsonline.com/7616535.html</link>
<description><![CDATA[A method for determining a track searching direction is disclosed. The method takes advantage of the characteristic that the movement of the photo-diode with respect to the optical disk is not perpendicular to the track direction. Therefore, the phase difference between the front side and the rear side of the photo-diode could be used to define a seeking error signal. The seeking error signal is used, together with a tracking error (TE) signal and a radio frequency ripple (RFRP) signal, to determine the track searching direction. Because the seeking error signal has a better signal-to-noise ratio, the phase lead or lag can be determined more accurately. As a result, the accuracy of detecting the track searching direction on a blank disk is improved.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Optical disc apparatus, tracking control method, and integrated circuit]]></title>
<link>http://www.freepatentsonline.com/7616539.html</link>
<description><![CDATA[An optical disc apparatus has: an optical head  400  for emitting a light beam onto a predetermined track of an optical disc  300  before tracking control in order to detect reflected light with a photodetector; an arithmetic circuit  130  for generating measurement signals each indicative of a time-varying change of light received on a respective one of a plurality of light receiving areas of the photodetector; an A/D converter circuit  140  for A/D converting each measurement signal; a microcomputer  190  for determining a correction value based on a difference, in terms of high- and low-frequency components, between measurement signals having been A/D converted; and an adder circuit  180  for adding the correction value to a driving value output from a tracking control circuit  170 , so that the driving value is corrected.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Recording medium, recording apparatus, and reading apparatus]]></title>
<link>http://www.freepatentsonline.com/7616545.html</link>
<description><![CDATA[In a recording medium, the physical characteristic information of the recording medium, and more specifically, the configuration (shape and size) and the moment of inertia of the disc, is recorded. This enables a recording apparatus or a reading apparatus to easily and correctly determine the physical characteristics of the disc, and thus to perform suitable settings for the recording or reading operation.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Recording and reproducing apparatus, recording and reproducing method, and storage medium]]></title>
<link>http://www.freepatentsonline.com/7616529.html</link>
<description><![CDATA[When the user designates the reproduction of searching audio data, the designated searching audio data and audio volume data are read from a searching data recording portion. The searching audio data is reproduced corresponding to the audio volume data. When the user designates the reproduction of main audio data, the selected audio data is read from a disc and reproduced. In addition, number-of-reproduction-times data, audio volume data, audio quality data, and time period data for the designated main audio data that are updated in the searching data storing portion. The searching audio data corresponding to the designated main audio data is read from the disc corresponding to the audio quality data and the time period data and recorded to the searching data storing portion.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Integrated optical unit, adjusting method therefor, and optical pickup]]></title>
<link>http://www.freepatentsonline.com/7616531.html</link>
<description><![CDATA[In an integrated optical unit of the present invention, a photo detector ( 12 ) and a holding member ( 17 ) that sustains a semiconductor laser ( 11 ) are provided on a polarizing beam splitter ( 14 ). This makes it possible to reduce a deviation from a designed value due to tolerance, and adjust a relative positional relationship between the semiconductor laser ( 11 ) and the photo detector ( 12 ). Therefore, returned light from an optical disk ( 4 ) is accurately adjusted with respect to a division line of a photo-detecting device ( 13 ). As a result, stable servo-control is realized, and an information signal with fine quality is obtained.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Optical disc apparatus and access control method of the same]]></title>
<link>http://www.freepatentsonline.com/7616533.html</link>
<description><![CDATA[An optical disc apparatus, as a learning operation before a recording or reproducing operation, rotates an optical disc at a first speed to read PID information, discriminates between lands and grooves of the optical disc, detects switching positions between lands and grooves, sets a rotation angle position of tracking pull-in of an objective lens of a time length that allows the PID information to be stably read, with respect to the switching position, and stores the set position information of tracking pull-in as learning result information. During recording or reproducing, the optical disc apparatus rotates the optical disk at a second speed higher than the first speed, pulls in the objective lens for tracking based on the stored position information of tracking pull-in, reads PID information, and performs the recording or reproducing operation while discriminating between lands and grooves and detecting switching positions between lands and grooves.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Method for determining kind of optical recording medium]]></title>
<link>http://www.freepatentsonline.com/7616534.html</link>
<description><![CDATA[A method for determining a kind of optical recording medium includes: performing focus searching and track searching on an optical recording medium; and determining a kind of optical recording medium according to an optical signal generated by the focus searching and an optical signal generated by the track searching.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Apparatus for radial tracking in an optical disc drive using tracking an error signal derived from wobble-induced signal components and/or data-induced signal components of a detector output]]></title>
<link>http://www.freepatentsonline.com/7616536.html</link>
<description><![CDATA[An optical disc drive uses a tracking error signal derived from the wobble-induced signal components of the optical detector signal. This tracking error signal is relatively insensitive to beamlanding errors, and to differences in the signal amplitudes of the output signal of individual detector segments. Further, the need for a 3-spot grating is eliminated. A distinction is made between a situation where the track being followed is empty, and a situation where the track being followed is written. In case the track being followed is empty, a tracking error signal is derived from the wobble-induced signal components of the optical detector signal, whereas, in case the track being followed is written, a tracking error signal is derived from the data-induced signal components of the optical detector signal.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Apparatus for and method of recording and reproducing information]]></title>
<link>http://www.freepatentsonline.com/7616540.html</link>
<description><![CDATA[An information recording and reproducing apparatus (S) is provided with: a first reproducing device ( 11 ) for reproducing audio information from a first information record medium (DK), in which the audio information is recorded; a recording device ( 28 ) for recording the reproduced audio information into a second information record medium (HD); a second reproducing device ( 28 ) for reproducing the audio information recorded in the second information record medium; and a controlling device ( 6 ) for setting a recording speed when recording the audio information into the second information record medium and a reproducing speed when reproducing the audio information from the second information record medium such that the recording speed is equal to or higher than the reproducing speed, and controlling the second reproducing device and the recording device so as to perform reproducing the recorded audio information from the second information record medium at the set reproducing speed in parallel to recording the audio information into the second information record medium at the set recording speed.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Disk recording medium, disk drive apparatus, reproducing method, and disk manufacturing method]]></title>
<link>http://www.freepatentsonline.com/7616543.html</link>
<description><![CDATA[A recording and reproducing area and a reproduction-only area are formed by wobbling a groove formed in a spiral fashion to form a track to be tracked on a disk. The recording and reproducing area has address information recorded by wobbling of the groove and information recorded and reproduced by phase change marks on the track formed by the groove where the address information is recorded. The reproduction-only area has prerecorded information recorded by wobbling of the groove.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Access unit, access method, computer-readable recording medium recorded with access program, and control unit]]></title>
<link>http://www.freepatentsonline.com/7616544.html</link>
<description><![CDATA[An access unit, an access method, an access program and a control unit are provided. A record medium includes a user area for recording user data which can be recorded and regenerated based on an instruction given by a user. A recording-system circuit section included in the access unit records test data based on a predetermined test condition in the user area. A regeneration-system circuit section included in the access unit reads the test data recorded in the user area by the recording-system circuit section, and a system control circuit included in the access unit refers to the test data read by the regeneration-system circuit section and adjusts an access parameter for accessing the record medium.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Optical pickup unit]]></title>
<link>http://www.freepatentsonline.com/7616550.html</link>
<description><![CDATA[An optical pickup unit is disclosed that comprises a first light-emitting element capable of emitting first-wavelength light; a second light-emitting element capable of emitting second-wavelength light whose wavelength is different from that of the first-wavelength light; a polarizing mirror transmitting or reflecting the first-wavelength light and reflecting the second-wavelength light; a first objective lens converging the first-wavelength light on a first medium; and a second objective lens converging the first-wavelength light or the second-wavelength light on a second medium.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[High-density recording medium and recording and/or reproducing device therefor]]></title>
<link>http://www.freepatentsonline.com/7617507.html</link>
<description><![CDATA[A high-density recording medium, and a recording and/or reproducing device are provided. At a transition area of the high-density recording medium allocated between a clamping area and an information area of the high-density recording medium is formed a step having a prescribed slope so that the high-density recording medium does not collide with an objective lens of an optical pickup provided in an optical disc device although the objective lens of the optical pickup is upwardly moved toward a recording layer of the high-density recording medium.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Method and apparatus for recording write-once type optical recording medium having defective management areas]]></title>
<link>http://www.freepatentsonline.com/7616541.html</link>
<description><![CDATA[A write-once-type recording medium ( 10 ) is provided with: a data area ( 11 ) to record therein record data; and a plurality of management areas in which a plurality of types of management information for managing the record data and index information for indicating newest management information can be recorded a plurality of times, each of the plurality of management areas having a setup area for recording therein a management information block including a plurality of types of management information constructed from the newest management information and the index information indicating the plurality of types of management information constructed from the newest management information.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Phase-change optical recording medium having first and second track pitches]]></title>
<link>http://www.freepatentsonline.com/7616552.html</link>
<description><![CDATA[An optical disc or other optical recording medium enables reading barcode-shaped-BCA marks in a burst cutting area (BCA) with tracking on while making tampering with the BCA marks difficult. The optical disc  100  has a first area  102  containing tracks at a first track pitch d 2 , and a second area  101  containing tracks at a second track pitch d 1 . The barcode-shaped marks  104  are recorded in the second area, and the second track pitch is wider than the first track pitch.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Optical disc drive]]></title>
<link>http://www.freepatentsonline.com/7616532.html</link>
<description><![CDATA[A small-sized optical disc drive includes one voice coil motor magnet within which a tracking coil and two focusing coils are disposed such that the tracking coil straddles the two poles of permanent magnets that are adjacently disposed. The two focusing coils are disposed on either side of the tracking coil, with each of the two focusing coils being only disposed over one of the permanent magnets.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Medium, apparatus, and method related to encryption resultant information]]></title>
<link>http://www.freepatentsonline.com/RE40957.html</link>
<description><![CDATA[A disk-shaped recording medium includes a transparent substrate, and an optical recording layer formed on the transparent substrate. A light source emits light. An optical head is operative for applying the light to the optical recording layer from the light source via the transparent substrate, for focusing the light on the optical recording layer, and for reproducing information from the optical recording layer. A position detecting device is operative for detecting at least one of a pit depth and a physical position of information which has a first given relation with a specified address and which is recorded on the recording medium, and for generating first positional information representing at least one of the pit depth and the physical position. A previously-recorded secret code is reproduced from the recording medium. The secret code represents second positional information. The secret code is decoded into the second positional information. The second positional information represents at least one of a predetermined reference pit depth and a predetermined reference physical position. The first positional information and the second positional information are collated, and a check is made as to whether or not the first positional information and the second positional information are in a second given relation. When the first positional information and the second positional information are not in the second given relation, one of outputting of a reproduced signal of the recording medium, operation of a program stored in the recording medium, and decoding of the secret code is stopped.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Medium, apparatus, and method related to encryption resultant information]]></title>
<link>http://www.freepatentsonline.com/RE40958.html</link>
<description><![CDATA[A disk-shaped recording medium includes a transparent substrate, and an optical recording layer formed on the transparent substrate. A light source emits light. An optical head is operative for applying the light to the optical recording layer from the light source via the transparent substrate, for focusing the light on the optical recording layer, and for reproducing information from the optical recording layer. A position detecting device is operative for detecting at least one of a pit depth and a physical position of information which has a first given relation with a specified address and which is recorded on the recording medium, and for generating first positional information representing at least one of the pit depth and the physical position. A previously-recorded secret code is reproduced from the recording medium. The secret code represents second positional information. The secret code is decoded into the second positional information. The second positional information represents at least one of a predetermined reference pit depth and a predetermined reference physical position. The first positional information and the second positional information are collated, and a check is made as to whether or not the first positional information and the second positional information are in a second given relation. When the first positional information and the second positional information are not in the second given relation, one of outputting of a reproduced signal of the recording medium, operation of a program stored in the recording medium, and decoding of the secret code is stopped.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Chromatic aberration-correcting element and optical pickup device using the same]]></title>
<link>http://www.freepatentsonline.com/7616549.html</link>
<description><![CDATA[The present invention is related to a chromatic aberration-correcting element which allows the adoption of BDs even when DVD/CD light beams are incident. The chromatic aberration-correcting element has a diffractive structure formed thereon, which can correct chromatic aberration in BD wavelength light beams in addition to adopting DVD/CD wavelength light beams. Also provided is an optical pickup device whose structure is simplified by employing the chromatic aberration-correcting element.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Disk transfer mechanism, and disk inspection apparatus and disk inspection method using the same]]></title>
<link>http://www.freepatentsonline.com/7616298.html</link>
<description><![CDATA[The present invention is provided with a first and second spindle at respective initial positions spaced apart by a predetermined distance and disposed linearly at both sides of inspection positions where the spindles are set for disk inspection, a disk inverting mechanism is provided at either the front side or the back side of the inspection position, at the same time when a disk fitted to the first spindle is transferred to the inspection position, a disk fitted to the second spindle is returned from the inspection position to own initial position, and at the same time when a disk fitted to the second spindle is transferred to the inspection position, a disk fitted to the first spindle is returned from the inspection position to own initial position, and the disk fitted to the first spindle which is returned to the own initial position is delivered to the disk inverting mechanism, thereby an inverted disk is fitted to the second spindle.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Disc clamping device for multiple standard discs]]></title>
<link>http://www.freepatentsonline.com/7616301.html</link>
<description><![CDATA[A vacuum assisted disc clamping device provides a number of fixture rings preferably concentrically stacked on a fixture body that is moveable in fixture ring stacking direction and actuated by a wedge drive to compensate for varying fixture levels associated with the individual fixture rings and disc standards. Each fixture ring includes a planar flange with a vacuum groove and a central conical portion that rises above the planar flange. The conical portion is defined with a diameter and cone angle such that a disc of corresponding dimensional standard may be readily placed on the fitting fixture ring with the disc bottom being sucked onto the planar flange while the disc hole centers on the conical portion.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Information reproduction apparatus]]></title>
<link>http://www.freepatentsonline.com/7616395.html</link>
<description><![CDATA[There is provided an information reproduction apparatus that can suppress degradations in the qualities of reproduced data and timing from due to interpolation errors when performing interpolation timing recovery, and that can avoid degradation in the stability of the system due to an increase in the timing recovery loop delay. An information reproduction apparatus ( 100 ) for reproducing data and timing from an analog signal including data information and timing information is provided with an expected value generator ( 106 ) for outputting plural expected values, and a maximum likelihood detector ( 107 ) for outputting data that corresponds to a sequence of the highest likelihood with an output sequence of an A/D converter among the plural expected value sequences, at the timing of a second clock.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Verification method and apparatus]]></title>
<link>http://www.freepatentsonline.com/7617426.html</link>
<description><![CDATA[A method for verifying whether a recording/reproducing apparatus properly produces disc management information and records the disc management information on a disc includes preparing a test disc; issuing reading commands to a recording/reproducing apparatus to be tested on which the test disc is loaded and verifying the disc in order to verify the reading operation; and issuing recording commands to the recording/reproducing apparatus to be tested on which the test disc is loaded and checking whether a temporary disc management area (TDMA) structure is properly updated on the disc in order to verify the modification operation.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Write-once optical disk and optical recording method]]></title>
<link>http://www.freepatentsonline.com/7615333.html</link>
<description><![CDATA[A write-once optical disk comprises a substrate, a recording layer which is stacked on the substrate and comprised of a first reaction layer comprised of a material containing hydrogen and a second reaction layer comprised of a material having an extinction coefficient greater than that in the first reaction layer, and a protective layer which is stacked on the recording layer.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Apparatus and method for checking network synchronization clock signal in communication system]]></title>
<link>http://www.freepatentsonline.com/7616721.html</link>
<description><![CDATA[In an apparatus and method for checking a network synchronization clock signal in a communication system, the apparatus generates a divided clock signal which is the same as an externally inputted network synchronization clock signal, compares the value of one period of the network synchronization clock signal to the value of one period of the divided clock signal, and determines whether the network synchronization clock signal is normal or not. Thus, the reliability of an operation of checking the network synchronization clock signal is enhanced.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Fluid filled devices]]></title>
<link>http://www.freepatentsonline.com/7616737.html</link>
<description><![CDATA[A device ( 100; 200; 300; 400 ) comprising a sealed cavity ( 210 ) containing n volumes of fluids ( 80, 87; 220, 230; 320, 332; 420, 422, 430, 432 ) is described, where n is an integer and n≧2. Each volume of fluid is substantially immiscible with every contiguous volume of fluid. The cavity is defined by an interior surface divided into n continuous areas ( 60, 170; 260, 270; 360, 362, 370; 460, 462, 470, 472 ), each continuous area corresponding to and being in contact with a respective one of the volumes of fluid. The wettability of each area is such that each volume of fluid preferentially adheres to the corresponding continuous area rather than any one of the continuous areas adjacent to the corresponding area.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Objective lens and optical head device]]></title>
<link>http://www.freepatentsonline.com/RE40954.html</link>
<description><![CDATA[An objective lens ( 1 ) for an optical disk, which focuses a light beam from a light source, is designed so that a third-order coma aberration generated when the objective lens is inclined at a unit angle is larger than a third-order coma aberration generated when the optical disk ( 2 ) is inclined at the unit angle, mounted on an actuator for inclining the objective lens according to an inclination amount of the optical disk, and used. With this structure, it is possible to obtain an objective lens for an optical disk that has a large numerical aperture and is easy to manufacture and assemble, and in which the third-order coma aberration generated when the optical disk surface is inclined owing to a warp or the like can be corrected by small inclination of the objective lens, so as to reduce a residual astigmatism, which is generated according to the inclination amount, after the correction.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
</item>

<item>
<title><![CDATA[Systems and methods for enumerative encoding and decoding of maximum-transition-run codes and PRML (G,I,M) codes]]></title>
<link>http://www.freepatentsonline.com/7616134.html</link>
<description><![CDATA[Systems and methods for encoding/decoding are provided. The systems and methods include encoding a stream of K-bit input sequences into a stream of (G, I, M)-constrained 2N-bit output sequences by transforming each K-bit input bit sequence into two separate data paths including even and odd bits. Enumerative maximum-transition-run (eMTR) encoding of the even bits generates constrained even bits, and enumerative maximum-transition-run (MTR) encoding of the odd bits generates constrained odd bits. The constrained even and constrained odd bits are interleaved to form a stream of (G, I, M)-constrained 2N-bit output sequences where G is a global constraint, I is an interleave constraint, and M is a variable frequency oscillator constraint of a partial-response maximum-likelihood (PRML) codeword. Decoding systems and methods are also provided.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
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<item>
<title><![CDATA[Apparatus discriminating type of recording medium and method of discriminating type of recording medium]]></title>
<link>http://www.freepatentsonline.com/7614716.html</link>
<description><![CDATA[A method of discriminating a type of recording medium and a discriminating apparatus in which the type of recording medium is discriminated based on a temperature change of the recording medium when the recording medium is heated. A type of recording medium is discriminated based on a phase difference between a pulse signal input to a heating device and a pulse signal output by a detecting device detecting a temperature of a recording medium.]]></description>
<pubDate>Tue, 10 Nov 2009 08:00:00 EST</pubDate>
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