Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1986-04-02
1987-12-22
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D02933284
REFERENCES:
patent: D136847 (1943-12-01), Cardona
patent: D158064 (1950-04-01), Gay, Jr. et al.
patent: D202130 (1964-08-01), Mitchell
patent: D271211 (1983-11-01), Raicevic
patent: 2274791 (1942-03-01), Huggins
patent: 2296634 (1942-09-01), Fink
patent: 2645775 (1953-07-01), Splaine
patent: 4271538 (1981-06-01), Montesi et al.
patent: 4547909 (1985-10-01), Bell
Optometric Monthly Apr. 1983, p. 222; Frames in lower left photo.
Hase Mark A.
Murphy Marvin G.
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