Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1983-02-18
1985-11-05
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D02812460
REFERENCES:
patent: D270729 (1983-09-01), Lahey et al.
Computer Design, 6-1981, p. 173, Ontel Keyboard.
International Business Machines
Lucas Susan J.
Poag Frederick D.
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