Inventor
WILLARD DAVID FRANK
5 patents
Patents
5 patentsUS4021653AMay 3, 1977
Digital programmable tone detector
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US5682147AOct 28, 1997
Method and apparatus for selecting a receive frequency in a communication receiver
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US5686898ANov 11, 1997
Paging network identification information distributed in address field
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US4103286AJul 25, 1978
Digital binary group call circuitry arrangement
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US6477381B1Nov 5, 2002
Selective call receiver and method for detecting mandatory frames of a channel protocol
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