BIDIRECTIONAL VOICE FREQUENCY REPEATERS
JUDY PAT MAGEE, GLENDON RUSSELL PORTER, ROY BAXTER BLAKE, JR, JAMES DEGOULARD GWATKIN, III
Year of Publication 15.02.1979
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Year of Publication 15.02.1979
Patent
Bidirectional voice frequency repeater
PORTER; GLENDON RUSSELL, MAGEE; JUDY PAT, GWATKIN, III; JAMES DEGOULARD, BLAKE, JR.; ROY BAXTER
Year of Publication 14.02.1978
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Year of Publication 14.02.1978
Patent