Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1975-06-09
1977-06-14
Stearman, Joel
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605
Patent
active
D02446871
REFERENCES:
patent: D212173 (1968-09-01), Ackermann
patent: D232773 (1974-09-01), Kato
patent: D232973 (1974-09-01), Arnoldy et al.
Asahi Kogaku Kogyo Kabushiki Kaisha
McNenny Harold F.
Rademaker C. A.
Stearman Joel
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