Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1983-07-21
1986-04-15
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 1
Patent
active
D02834278
REFERENCES:
patent: D213806 (1969-04-01), Ikegami
patent: D221256 (1971-07-01), Fukuda
patent: D224350 (1972-07-01), Fukuda
patent: D237833 (1975-11-01), Winkler
patent: D238613 (1976-01-01), Waaske
patent: D263056 (1982-02-01), Haituri
patent: 3938170 (1976-02-01), Winkler
patent: 4240735 (1980-12-01), Maitani
patent: 4273434 (1981-06-01), Maitani
patent: 4299465 (1981-11-01), Chan
Holtje Nelson C.
Konishiroku Photo Ind. Co., Ltd.
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