Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-09-16
1979-10-16
Ansher, Bernard
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 83, 250213VT, D1606
Patent
active
D02531771
REFERENCES:
patent: D228027 (1973-07-01), Heckel et al.
patent: D248860 (1978-08-01), Spranger et al.
patent: D250341 (1978-11-01), McClure
patent: 3787688 (1974-01-01), Stone
patent: 3803407 (1974-04-01), Anderson
Ansher Bernard
Smith & Wesson Chemical Company, Inc.
Walsh Patrick J.
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