Jewelry gauges

Details Jewelry gauges Jewelry gauges

1992-02-28

1993-12-28

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03426840

REFERENCES:
patent: D162848 (1951-04-01), Lehrfeld
patent: D243389 (1977-02-01), Lyon
patent: 628310 (1899-07-01), Goldner
patent: 1881651 (1932-10-01), Judge
Gesswein, Baker Diamond & Stone Gauges.
Swest Inc; Stone & Mounting Gauge; p. 29.
Vizor, Tools Supplies Equipment Cat., pp. 79 and 103.
Tools 1991; Various Stone & Diamond Gauges; 1991 p. 66.

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