Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1987-10-07
1990-05-08
Burke, Wallace R.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D03077489
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Cardona Ramon M.
Geis David G.
Huntoon Francis E.
Johnson Chris G.
Lewinski Kenneth F.
American Telephone & Telegraph Company
AT&T Information Systems
Burke Wallace R.
Nunn Freda S.
Tirva A. A.
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