Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1981-08-21
1984-01-24
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
D1402
Patent
active
D02723492
REFERENCES:
patent: D243254 (1977-02-01), Coon
Byte, 2-1980, p. 139, RCA ASC11 Keyboard.
Byte, 9-1980, p. 209, Sinclair 2X80 Computer.
Lucas Susan J.
Sinclair Research Limited
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