Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1985-03-20
1987-05-19
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 38
Patent
active
D02898780
REFERENCES:
patent: D201158 (1965-05-01), Wessels
patent: D246372 (1977-11-01), Yoshino
patent: D283624 (1986-04-01), Maitani
patent: 4294530 (1981-10-01), Iwashita
patent: 4367937 (1983-01-01), Mashimo
Holtje Nelson C.
Ricoh & Company, Ltd.
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