Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1993-07-19
1995-01-03
Douglas, Alan P.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
D10109, D14130, D14142
Patent
active
D03540472
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patent: 3598920 (1971-08-01), Fischer
Leggate William
Sirois Michael
Asch Jeffrey
Concourse Technologies Corporation
Douglas Alan P.
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