Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1983-09-26
1985-10-08
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02809079
REFERENCES:
patent: D251912 (1979-05-01), Nakade
patent: D257984 (1981-01-01), Kurozumi
patent: D270164 (1983-08-01), Sawada
patent: D270540 (1983-09-01), Sakurai
patent: D275960 (1984-10-01), Matsuzaka
patent: D276051 (1984-10-01), Kosako
patent: D276347 (1984-11-01), Matsuzaka
patent: 3813157 (1974-05-01), Fantozzi
patent: 4268164 (1981-05-01), Yajima
Holtje Nelson C.
Olympus Optical Company Ltd.
Weinstein Louis
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