Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-10-22
1984-12-11
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02767309
REFERENCES:
patent: D262635 (1982-01-01), Iwasaki
patent: D263147 (1982-02-01), Iwasaki
patent: D265481 (1982-07-01), Iwasaki
patent: 2717138 (1955-09-01), Sheehan
patent: 4010923 (1977-03-01), Miller
Osawa (Flyer) "How to Choose a Tripod"--6/81--p. 1--Tripod Head at top.
Industrial Design--6/55--p. 92--Tripod Head at bottom.
Holtje Nelson C.
Velbon International Cororation
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