Matches 601 - 650 out of 699 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 >
Match Document Document Title
3912876 Frequency division switching network  
Disclosed is a switching network usable in exchanges of a telecommunications system using frequency division switching. The input and output terminal circuits are interconnected by means of a...
3897592 Voice-operated transmit system  
Control apparatus is provided to intercommunicate transmit-receive systems such as radio sets one with another or with a telephone network. First and second signal processors convert a signal input...
3840811 DUPLEXER TYPE RADIO-TELEPHONE DATA RECEIVER AND TRANSMISSION SYSTEM  
A radio-telephone system embodying a duplexer network whereby a request for computerized data may be transmitted to a base station and the data received from the base station through a single...
3729595 RADIOTELEPHONE SYSTEM WITH CENTRAL OFFICE HAVING INDIVIDUAL PROCESSORS ASSIGNABLE TO RESPECTIVE MOBILE UNITS ABOARD COMMUNICATING VEHICLES  
A central office, designed for short-wave radiocommunication with mobile units aboard several vehicles in its area, has a plurality of fixed processing units operating on different frequency...
3626112 AUTOMATIC MOBILE RADIOTELEPHONE NETWORKS  
A switching scheme is provided for a telephone exchange having an attached switching section for serving mobile sets. Subscriber-line circuits are provided in the said section, each allotted to a...
3614326 TELEPHONE ACTUATED SWITCH  
An electronic switch serving as a communications link between a remotely situated telephone caller and a headquarters. The communications link is adapted to connect a two-way radio to the telephone...
3562438 INTRAPLANT RADIO COMMUNICATION SYSTEM  
This invention relates to an intraplant communication system which provides, in addition to telephone communication, radio channels of communication whereby communication may be had with roving...
3535689 METHOD AND CIRCUIT ARRANGEMENT TO CONNECT SUBSCRIBER TELEPHONE STATIONS AND HANDSETS VIA RADIO IN TELEPHONE SYSTEMS  
3513264 CONTROLLED RANDOM MULTIPLE ACCESS COMMUNICATION SYSTEM  
3484557 SUPERVISORY SIGNALING OVER RADIO-TELEPHONE SYSTEM  
3410963 AUTOMATIC REVERTIVE CALLING OVER A MOBILE TELEPHONE SYSTEM  
3198888 Radio telephone communication system  
3123675 Title is not available  
3118018 Mobile radio telephone integrated system  
3110773 Delayed call telephone system  
3094661 Radio telephone system  
3087998 Radio telephone system  
3065421 Radio-telephone communication system having means for automatic direct dispatch between mobile stations  
3050591 Automatic mobile telephone system  
3041402 Automatic mobile telephone system  
3009149 Automatic dial radio telephone system  
2987615 Mobile selector for common carrier radio telephone service  
2933560 Telecommunication systems  
2907874 Microwave communication system  
2901543 Radio system comprising a main station and a plurality of substations  
2870263 Radio or carrier terminal dial selector  
2843675 Radio telephone dispatch control and signaling circuit  
2680154 Arrangement for single-channel time sharing  
2670435 Radiotelephone communication system  
2665375 Radio telephone system  
2649540 Multiplex radiophone communication system  
2641757 Automatic multichannel selection  
2635233 Multiplex radiophone communication system  
2629092 Multichannel mobile telephone system  
2623164 Single channel, single frequency, mobile radio telephone system  
2616080 Time division multiplex radiophone system  
2589662 Radiotelephone receiving system  
2576115 Arrangement for transmitting electric signals occupying a wide frequency band over narrow band circuits  
2564660 Means for interconnecting radio and telephone systems  
2548777 Signaling apparatus for radio telephone systems  
2532719 Dimensional radio communication system  
2532310 Time-division multiplex radiophone system  
2512613 Selective call system  
2508613 Arrangement for radio-telephone traffic through exchange between mobile stations andbetween such stations and a telephone network  
2475675 Radio switching system  
2458558 Radiotelephone equipment  
2401759 Directionally selective radio communication system  
2341224 Two-way radio telephone system  
2298435 Radio relaying  
2265056 Radio telephone system  
Matches 601 - 650 out of 699 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 >