Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1981-03-02
1983-09-06
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1601
Patent
active
D02704501
REFERENCES:
patent: D263310 (1982-03-01), Kato
patent: 3451322 (1969-06-01), Noda
patent: 3820148 (1974-06-01), Osanai
patent: 4221476 (1980-09-01), Aizawa
patent: 4294530 (1981-10-01), Iwashita
Holtje Nelson C.
Ricoh & Company, Ltd.
Scobey Robert
Shoup Guy W.
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