Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-10-22
1985-01-29
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02773899
REFERENCES:
patent: D263147 (1982-02-01), Iwasaki
patent: 1120843 (1914-12-01), Palumbus
patent: 1259126 (1918-03-01), Packes
patent: 1386664 (1921-08-01), Vaeth
patent: 2214192 (1940-09-01), Burnett
patent: 2297927 (1942-10-01), Whitman
patent: 2384790 (1945-09-01), Bulsey
patent: 2681784 (1954-06-01), Odin
patent: 2717138 (1955-09-01), Sheehan
Industrial Design-6/55-p. 92-Tripod Head at bottom.
British Journal of Photography-1/71-p. 15-Tripod at bottom.
Holtje Nelson C.
Velbon Int'l Corporation
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