Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1979-12-13
1982-02-23
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605
Patent
active
D02631474
REFERENCES:
patent: D179828 (1957-03-01), Welt
patent: D198412 (1964-06-01), Mooney
patent: D221693 (1971-08-01), Bradspies
patent: D222596 (1971-11-01), Leubner
patent: D257260 (1980-10-01), Shiraishi
patent: D257261 (1980-10-01), Shinohara
patent: 2668682 (1954-02-01), Dalton
patent: 2940709 (1960-06-01), Neuwirth
Holtje Nelson C.
Slik Tripod Co., Ltd.
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