Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-08-25
1980-08-19
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1601
Patent
active
D02564688
REFERENCES:
patent: D250121 (1978-10-01), Waaske
patent: 3938170 (1976-02-01), Winkler et al.
patent: 4012754 (1977-03-01), Waaske
Schlagheck Norbert
Schultes Herbert
AGFA-Gevaert A.G.
Kemper Catherine E.
Striker Michael J.
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