Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1975-12-03
1977-07-26
Stearman, Joel
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D163
Patent
active
D02451662
REFERENCES:
patent: D233937 (1974-12-01), Hutcheson et al.
patent: D237279 (1975-10-01), Daniels et al.
Bevilacqua Ernest Michael
Hawthorne Allen Dana
Noyes Eliot Fette
Cockburn Joscelyn G.
International Business Machines - Corporation
Rademaker C. A.
Stearman Joel
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