Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1984-07-17
1986-11-04
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02865408
REFERENCES:
patent: D234005 (1974-12-01), Yagi
patent: D263962 (1982-04-01), Kurozumi
patent: D267565 (1983-01-01), Fossella
patent: D272830 (1984-02-01), Hara
patent: D276238 (1984-11-01), Kosako
patent: D278347 (1985-04-01), Kawazu
patent: D281170 (1985-10-01), Hara
patent: 3891203 (1975-06-01), Schiff
patent: 4279504 (1981-07-01), Brown
patent: 4306713 (1981-12-01), Auritt
Holtje Nelson C.
Ricoh & Company, Ltd.
Shoup Guy W.
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