Thumb supported reading magnifier or similar article

Details Thumb supported reading magnifier or similar article Thumb supported reading magnifier or similar article

1983-07-01

1984-09-11

Burke, Wallace R.

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

Patent

active

D02754975

REFERENCES:
patent: D146272 (1947-01-01), Van Dyke
patent: D194995 (1963-04-01), Hoogesteger
patent: D220724 (1971-05-01), Alaska
patent: 465513 (1891-12-01), Applegate
patent: 1264267 (1918-04-01), Bugbee
patent: 1518419 (1924-12-01), Styll
patent: 2056693 (1936-10-01), Stanley
patent: 2057807 (1936-10-01), Whitmore
patent: 2166888 (1939-07-01), Fosdick
patent: 2527071 (1950-10-01), Pierce
patent: 3712712 (1973-01-01), Bosma

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