Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1980-09-22
1982-07-27
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02655640
REFERENCES:
patent: D224054 (1972-06-01), Derby
patent: D224754 (1972-09-01), Zinni
patent: D228810 (1973-10-01), Zinni
patent: 4247192 (1981-01-01), Komori
DuBois R. Clark
Hamma John C.
Gradco Dendoki, Inc.
Holtje Nelson C.
Lee, Jr. Newton H.
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