Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1984-11-28
1986-10-28
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02864088
REFERENCES:
patent: 3748986 (1973-07-01), Kimura
patent: 3854142 (1974-12-01), Whitley
patent: 4294530 (1981-10-01), Iwashita
patent: 4422745 (1983-12-01), Hopson
patent: 4435056 (1984-03-01), Tanikawa
Holtje Nelson C.
Victor Hasselblad AB
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