Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-06-21
1985-04-09
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02783479
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patent: D160862 (1950-11-01), Johnson
patent: D214959 (1969-08-01), Anderson
patent: D234005 (1974-12-01), Vagi
patent: D263662 (1982-04-01), Kurozumi
patent: 3262697 (1966-07-01), Krinke
patent: 3891203 (1975-06-01), Schiff
patent: 4279504 (1981-07-01), Brown
patent: 4421404 (1983-12-01), Conly
Holtje Nelson C.
Olympus Optical Company Ltd.
Weinstein Louis
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