Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1980-06-30
1982-11-30
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1699
Patent
active
D02670976
REFERENCES:
patent: D214021 (1969-05-01), Bacialli
patent: D218152 (1970-07-01), Emerson
patent: D220679 (1971-05-01), Finkel
patent: D245761 (1977-09-01), Alseth
McChesney John L.
Tacklind Thomas A.
Carothers, Jr. W. Douglas
Holtje Nelson C.
Xerox Corporation
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