Geometrical instrument

Details Geometrical instrument Geometrical instrument

1980-01-07

1982-01-26

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D1004

Patent

active

D02627795

REFERENCES:
patent: D28880 (1898-06-01), Nauds
patent: D142608 (1945-10-01), Ziegfeld
patent: D216329 (1969-12-01), Waterloo
patent: 1660624 (1928-02-01), Musham
patent: 1708551 (1929-04-01), Nell

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