Linen tester

Details Linen tester Linen tester

1981-05-11

1984-03-13

Holtje, Nelson C.

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

D16 17

Patent

active

D02730146

REFERENCES:
patent: D127030 (1941-05-01), Bettcher
patent: D181321 (1957-10-01), Stowell
patent: D214137 (1969-05-01), Bright
patent: D246047 (1977-10-01), Zalman
patent: 597758 (1898-01-01), Bausch
patent: 1702317 (1929-02-01), Rose
patent: 2096696 (1937-10-01), Land
patent: 2601619 (1952-06-01), Loomis
patent: 2682806 (1954-07-01), Gordonier
patent: 3756699 (1973-09-01), Martin

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