Oval lenticular lens

Details Oval lenticular lens Oval lenticular lens

1975-05-12

1977-02-15

Stearman, Joel

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1606

Patent

active

D02433940

REFERENCES:
patent: D132980 (1942-07-01), Robbins
patent: 2133498 (1938-10-01), Dittmer
patent: 2330837 (1943-10-01), Mullen
Modern Plastics, 11-1967, p. 219, lens at bottom of page.
Goldschmiede Zeitung, 12-1973, p. 55, No. 53335 Watch Case & Lens.

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