Watch crystal protector

Details Watch crystal protector Watch crystal protector

1980-10-20

1982-12-14

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Dial, indicator hand, or other element or attachment

Watch or clock element, or attachment

D1007

Patent

active

D02672391

REFERENCES:
patent: 1986328 (1935-01-01), Dreyfus
patent: 2553089 (1951-05-01), Holder
patent: 2582473 (1952-01-01), Belfert
patent: 2635416 (1953-04-01), Mietchen
patent: 2692070 (1954-10-01), Kammer
patent: 2998695 (1961-09-01), Cornett
patent: 3584455 (1971-06-01), Sion
patent: 3712049 (1973-01-01), Luxembourg

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