Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1983-06-07
1985-07-16
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02796848
REFERENCES:
patent: D240080 (1976-05-01), Brown
patent: D260903 (1981-09-01), Overman
patent: D266252 (1982-09-01), Sumi
patent: D275201 (1984-08-01), Taylor
patent: 3224355 (1965-12-01), Thomiszer
patent: 3522991 (1970-08-01), Bowen
Overman John W.
Wells Thomas R.
Bell & Howell Company
Haggard Alan H.
Holtje Nelson C.
Johnson Neal C.
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