Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1984-10-09
1987-07-14
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D02908468
REFERENCES:
patent: D283895 (1986-05-01), Grimes
patent: 4158130 (1979-06-01), Speraw et al.
IBM Technical Disclosure Bulletin, vol. 16, No. 2, 7-1973, p. 575, T. F. Cummings, Variable Keyboard for Terminal Displays.
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