Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1980-01-02
1982-02-23
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02631466
REFERENCES:
patent: D224665 (1972-08-01), Hoffman
patent: D225777 (1973-01-01), Kakii
patent: D231129 (1974-04-01), Case
patent: D248957 (1978-08-01), Kitai
patent: D257984 (1981-01-01), Kurozumi
patent: 4139298 (1979-02-01), Tani
patent: 4247192 (1981-01-01), Komori
Holtje Nelson C.
Ricoh & Company, Ltd.
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