Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1986-01-02
1988-11-29
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02987597
REFERENCES:
patent: D263962 (1982-04-01), Kurozumi
patent: D278347 (1985-04-01), Kawazu
patent: D283625 (1986-04-01), Goto
patent: D286540 (1986-11-01), Hashimoto
patent: 3957366 (1976-05-01), Taylor
Hashimoto Masanori
Imai Akira
Holtje Nelson C.
Ricoh & Company, Ltd.
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