Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-04-12
1984-12-04
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 26, D16 36
Patent
active
D02766191
REFERENCES:
patent: D236916 (1975-09-01), Wolfe
patent: 1933659 (1933-11-01), Curran
patent: 2140729 (1938-12-01), Atwood
patent: 2528668 (1950-11-01), Schenkel
patent: 3119490 (1964-01-01), Bedford
patent: 3247558 (1966-04-01), Kaufman
Holtje Nelson C.
Wagner John E.
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