Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-09-02
1979-12-04
Ansher, Bernard
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 83, D1606
Patent
active
D02535980
REFERENCES:
patent: D191377 (1961-09-01), Kraus
patent: D199371 (1964-10-01), Kraus
patent: 2948189 (1960-08-01), Fischer
Sky & Telescope, Mar. 1970, p. 200, Telescope, bottom of page.
Ansher Bernard
Edmund Scientific Company
Smith, Jr. George A.
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