Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1981-06-11
1983-09-13
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02705370
REFERENCES:
patent: D261147 (1981-10-01), Lawrence
patent: D261148 (1981-10-01), Lawrence
patent: 3868019 (1975-02-01), Stemmle
patent: 4165168 (1979-08-01), Baumann
Holtje Nelson C.
Tokyo Shibaura Denki Kabushiki Kaisha
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