Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1975-09-25
1977-07-05
Stearman, Joel
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605
Patent
active
D02449340
REFERENCES:
patent: D207639 (1967-05-01), Walstrom
patent: D218261 (1970-08-01), Johnson et al.
patent: 3560083 (1971-02-01), Brownscombe
patent: 3733121 (1973-05-01), Smitzer
patent: 3907418 (1975-09-01), Okuyama
Bergo Ralph M.
DiSorbo Robert T.
Hauser Stephen G.
Keith Keith S.
Rademaker C. A.
Stearman Joel
Stromberg Datagraphix Inc.
Wiseman Jack W.
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