Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-03-16
1980-07-01
Ansher, Bernard
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 54, D16 55, D1606
Patent
active
D02556901
REFERENCES:
patent: D163373 (1951-05-01), Da Corta
patent: D229231 (1973-11-01), Beeren
patent: 1971519 (1934-08-01), Bradford
patent: 3955884 (1976-05-01), Del Pesco, Sr.
Industrial Magnifiers, Bausch & Lomb, .COPYRGT.May 1969, p. 17, Adjustable Rectangular Magnifier.
Tourtellotte Helen I.
Tourtellotte John F.
Ansher Bernard
Thompson Jr. Woodford R.
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