Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1989-02-13
1991-10-15
Dunkins, Bruce W.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
D19 46, D19 48
Patent
active
D03207870
REFERENCES:
patent: D238680 (1976-02-01), Pulos et al.
patent: D294263 (1988-02-01), Rodgers et al.
patent: D307421 (1990-04-01), Tedham et al.
patent: D312659 (1990-12-01), Oka
patent: 4184044 (1980-01-01), Zwerenz
patent: 4268730 (1981-05-01), Higgins et al.
patent: 4532376 (1985-07-01), Rockwell
patent: 4667182 (1987-05-01), Murphy
patent: 4707571 (1987-11-01), Clements et al.
Merritt Charles
Valls William
Dunkins Bruce W.
Summagraphics Corporation
Thompson Martha
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