Information method and apparatus using simplex and duplex communications | Patent Number 04845658
US 04845658 NAFilled DateDec 1, 1986
Priority DateDec 1, 1986
Publication Date-
Expiration DateJul 4, 1993
Inventor/Applicants David K. Gifford
ExaminesKRIESS, KEVIN A
Art Unit2307
Technology Center2300
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