Depth gauge

Details Depth gauge Depth gauge

1984-09-28

1986-12-30

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 64, D10 71

Patent

active

D02874750

REFERENCES:
patent: D182193 (1958-02-01), Minors
patent: D259026 (1981-04-01), Thornton
patent: 563579 (1896-07-01), Fearon
patent: 697701 (1902-04-01), Ayer
patent: 1034547 (1912-08-01), Welsh
patent: 2114936 (1938-04-01), Pilnick
patent: 2375982 (1945-05-01), Erikson

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