Inventor
WAGNER THEODORE W
US6 patents
Patents
6 patentsUS4375584AMar 1, 1983
Modular telephone keyset structure
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US4389544AJun 21, 1983
Digital telephone apparatus
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US4396805AAug 2, 1983
Ring trip detector for a subscriber line interface circuit
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US4485277ANov 27, 1984
Apparatus for transmitting and/or receiving balanced signals on a two-wire telecommunication line
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US4897871AJan 30, 1990
Apparatus for transmitting and/or receiving balanced signals on a two-wire telecommunication line
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US4682356AJul 21, 1987
Apparatus for transmitting and/or receiving balanced signals on a two-wire telecommunication line
SIEMENS CORP4 citations59