Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1986-02-04
1988-11-01
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02983311
REFERENCES:
patent: D218806 (1970-09-01), Berg
patent: D272251 (1984-01-01), Yoshihama
patent: D284865 (1986-07-01), Gendron
patent: D289300 (1987-04-01), Saito
patent: 3847306 (1974-11-01), Howell
patent: 4076149 (1978-02-01), Saxinger
Maeshima Masanobu
Takahashi Ichirou
Holtje Nelson C.
Mita Industrial Co. Ltd.
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