Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1984-12-06
1987-05-12
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02897717
REFERENCES:
patent: D251912 (1979-05-01), Nakade
patent: D270164 (1983-08-01), Sawada
patent: D276051 (1984-10-01), Kosako
patent: D278152 (1985-03-01), Hara
patent: D278346 (1985-04-01), Saito
patent: D280633 (1985-09-01), Saito
patent: D280907 (1985-10-01), Imada
Hashimoto Masanori
Imai Akira
Holtje Nelson C.
Ricoh & Company, Ltd.
Shoup Guy W.
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