Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-04-19
1978-07-11
Ansher, Bernard
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D14 99, D1699
Patent
active
D02484820
REFERENCES:
patent: 3252163 (1966-05-01), Yedinak et al.
patent: 3798659 (1974-03-01), Hasebe et al.
patent: 3827394 (1974-08-01), Takahashi et al.
patent: 3992000 (1976-11-01), Martin
Ansher Bernard
Esterline Augus Instrument Corp.
Woodard Harold R.
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