Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1983-07-20
1986-03-04
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D02828480
REFERENCES:
patent: 3835464 (1974-09-01), Rider
patent: 4292510 (1981-09-01), Hild
New Q Co., "Writehander"Ad, One-Hand Keyboard.
Depraz S.A.
Lucas Susan J.
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