Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1984-04-06
1987-04-14
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D02892910
REFERENCES:
patent: D263396 (1982-03-01), Horikoshi
patent: 3673579 (1972-06-01), Graven
patent: 3761877 (1973-09-01), Fernald
Computer Design, 1-1981, inside rear cover, Hipad.TM. Digitizer.
Form, 4-1977, p. 46, Keyboard, bottom left.
Cockburn Joscelyn G.
International Business Machines Corp.
Lucas Susan J.
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