Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-10-22
1985-10-08
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02809087
REFERENCES:
patent: 2282285 (1942-05-01), Olson
patent: 3051425 (1962-08-01), Homrighausen
patent: 4324477 (1982-04-01), Miyazaki
Osawa Brochure, 6/81-"How to Choose a Tripod"-p. 5-Tripods.
Sachtler Brochure-4/3/83-Tripod Leg Locks-p. 2, third from top.
Holtje Nelson C.
Velbon International Corporation
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