Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-07-29
1984-12-25
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02769166
REFERENCES:
patent: 3900862 (1975-08-01), Bennett
patent: 4219272 (1980-08-01), Bruckel
patent: 4229474 (1981-11-01), Ernst
patent: 4327992 (1982-05-01), Babicz
Canon Kabushiki Kaisha
Holtje Nelson C.
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