Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1984-03-27
1986-09-02
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02854490
REFERENCES:
patent: D154985 (1949-08-01), Bouchetal
patent: D213852 (1969-04-01), Olson
patent: D271880 (1983-12-01), Agou
patent: D271881 (1983-12-01), Kato
patent: 4171894 (1979-10-01), Yamada
Popular Photography-6/83-p. 73-Cameras at bottom-left and center.
Holtje Nelson C.
Ricoh & Company, Ltd.
Shoup Guy W.
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