Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1980-11-07
1983-04-26
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1601
Patent
active
D02687640
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patent: 4325619 (1982-04-01), Seckendorf
Sanchez John
Seckendorf Bernard A.
Holtje Nelson C.
Wrist-A-Matic, Ltd.
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