Spectacle shield

Details Spectacle shield Spectacle shield

1979-02-23

1981-12-08

Lucas, Susan J.

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

D 2234, D16110, D1606, D0203

Patent

active

D02622203

REFERENCES:
patent: D172120 (1954-05-01), Zuckerman
patent: 2441659 (1948-05-01), Chalmers
patent: 2541242 (1951-02-01), Grove

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