Photography and optical equipment – Projector or viewer – Integrated unit
Patent
1988-10-27
1991-07-23
Feifer, Melvin B.
Photography and optical equipment
Projector or viewer
Integrated unit
Patent
active
D03184781
REFERENCES:
patent: D183462 (1958-09-01), Maiershofer et al.
patent: D239467 (1976-04-01), Ouden
patent: D256869 (1980-09-01), Arnone
patent: D266094 (1982-09-01), Gher et al.
patent: 4574505 (1986-03-01), Chiodo
Feifer Melvin B.
Hyder Philip
Marquis Harold L.
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