Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1975-09-19
1977-04-05
Stearman, Joel
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02439476
REFERENCES:
patent: 3269262 (1966-08-01), Kampf
patent: 3689930 (1972-09-01), Strickland
patent: D219840 (1971-02-01), Sakuma
patent: D229777 (1974-01-01), Terauchi et al.
Rademaker C. A.
Stearman Joel
Sughrue Richard C.
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