Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1981-04-08
1983-12-06
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16134, D1605
Patent
active
D02716984
REFERENCES:
patent: D248160 (1978-06-01), Feinbloom
patent: 3900021 (1975-08-01), Makepeace
patent: 4219013 (1980-08-01), Okada
patent: 4264167 (1981-04-01), Plummer
patent: 4273431 (1981-06-01), Farmer
Holtje Nelson C.
Olympus Optical Co,. Ltd.
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