Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1983-12-21
1986-05-13
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 2
Patent
active
D02838206
REFERENCES:
patent: D226731 (1973-04-01), Conner
patent: D232263 (1974-07-01), Emmerling
patent: D233171 (1974-10-01), Land
patent: 2511531 (1950-06-01), Hencke
patent: 3396649 (1968-08-01), Bishop
patent: 3709119 (1973-01-01), Van Der Meer
patent: 3836927 (1974-09-01), Dine
patent: 4218122 (1980-08-01), Drafahl
patent: 4222654 (1980-09-01), Bodenhamer
Holtje Nelson C.
Lester A. Dine, Inc.
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