Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1986-02-28
1988-11-01
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02983320
REFERENCES:
patent: D208377 (1967-08-01), Wagner
patent: D218805 (1970-09-01), Stone
patent: D236694 (1975-09-01), Avolio
patent: D240201 (1976-06-01), Avolio
patent: D252557 (1979-08-01), Walker
patent: D284865 (1986-07-01), Gendron
patent: 3023925 (1962-03-01), Sher
patent: 3338410 (1967-08-01), Saith
patent: 4688926 (1987-08-01), Manno
patent: 4732277 (1988-03-01), Smith
Holtje Nelson C.
Mita Industrial Co. Ltd.
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