Title:
BEHAVIORAL SUPERVISION SYSTEM WITH WRIST CARRIED TRANSCEIVER
United States Patent 3478344
US Patent References:
/1250743.html
- - 1250743

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- - 2597517

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- - 3092829

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- - 3115622

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- - 3257653


Inventors:
Schwitzgebel, Ralph K.
Hurd, William Sprech
Publication Date:
11/11/1969
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Assignee:
Ralph, Schwitzgebel K.
William, Sprech Hurd
Primary Class:
340/7.630
Other Classes:
340/539.110, 340/539.100, 128/903, 455/575.600, 340/313
International Classes:
G08B26/00; H04M11/02; G08B27/00; G08B23/00
US Patent References:
2561421Receiver-transmitter arrangement
2910683Radio transmission system




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