Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1981-07-22
1984-07-17
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D02747260
REFERENCES:
patent: D247748 (1978-04-01), Ebner
Computer Design, 10-1979, p. 25, Hewlett-Packard HP 2621 CRT Terminal.
Lucas Susan J.
Plessey Overseas Limited
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