Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1984-01-09
1986-06-10
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02841975
REFERENCES:
patent: D214100 (1969-05-01), Ackerman
patent: D247041 (1978-01-01), Fukuda
patent: D247852 (1978-05-01), Fukuda
patent: D270840 (1983-10-01), Soda
patent: D271207 (1983-11-01), Soda
patent: D272829 (1984-02-01), Kato
patent: D276050 (1984-10-01), Soda
Imada Michio
Watarai Kazuhiko
Yamamoto Kazuo
Holtje Nelson C.
Olympus Optical Co,. Ltd.
Weinstein Louis
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