Auxiliary lenses for eyeglasses

Details Auxiliary lenses for eyeglasses Auxiliary lenses for eyeglasses

1986-10-29

1989-05-23

Dunkins, Bruce W.

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

D16113, D16117, D16121

Patent

active

D03012506

REFERENCES:
patent: D55468 (1920-06-01), Heilig
patent: D194994 (1963-04-01), Ruano
patent: 3379487 (1968-04-01), Amundsen
patent: 3575497 (1971-04-01), Le Blanc
patent: 4511226 (1985-04-01), Freeman

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