Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1983-04-15
1985-09-17
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02806312
REFERENCES:
patent: D245612 (1977-08-01), Zeuthen
patent: D246526 (1977-11-01), Kurozumi
patent: D264727 (1982-06-01), Matsuzaka
patent: D270253 (1983-08-01), DuBois
patent: D270452 (1983-09-01), Sukurai
patent: 3740132 (1973-06-01), Komori
patent: 4204668 (1980-05-01), Yanagawa
Holtje Nelson C.
Ricoh & Company, Ltd.
Shoup Guy W.
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