Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1983-07-14
1985-09-10
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02805189
REFERENCES:
patent: D243238 (1977-02-01), Olson
patent: D255456 (1980-06-01), Bevilacqua
patent: D266568 (1982-10-01), Sakow
patent: D270539 (1983-09-01), Horie
patent: 4334764 (1982-06-01), Rawson
Eiland Harry F.
Keith Glen S.
Holtje Nelson C.
Weiss Franklyn C.
Xerox Corporation
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