Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1986-08-20
1989-08-29
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
D18 7
Patent
active
D03031128
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IBM Technical Disclosure Bulletin vol. 23 No. 7B-12-1980 p. 3313 Portable Keyboard Display Unit.
Lucas Susan J.
Nunn Freda S.
Universal Data Incorporated
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