Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1989-01-03
1990-12-04
Burke, Wallace R.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
D18 4
Patent
active
D03126250
REFERENCES:
patent: D264467 (1982-05-01), Fischer
patent: D279474 (1985-07-01), Akagi et al.
patent: D294366 (1988-02-01), Nishibori et al.
patent: D295854 (1988-05-01), Harlan et al.
patent: D299029 (1988-12-01), Williams
Burke Wallace R.
Cockburn Joscelyn G.
International Business Machines Corp.
Nunn Freda S.
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