Centering rule

Details Centering rule Centering rule

1997-11-26

1998-10-20

Davis, Antoine Duval

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

1004

Patent

active

D03997693

REFERENCES:
patent: D137459 (1944-03-01), Colmery
patent: 181236 (1876-08-01), Wyckoff
patent: 193744 (1877-07-01), Wyckoff
patent: 304245 (1884-08-01), Thomas
patent: 4715127 (1987-12-01), Bernabeu

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