Curved ruler

Details Curved ruler Curved ruler

1996-05-24

1997-09-30

Davis, Antoine Duval

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 64, 1004

Patent

active

D03842975

REFERENCES:
patent: D33546 (1900-11-01), Eggleston
patent: D139083 (1944-10-01), Macht
patent: D146342 (1947-02-01), White
patent: 360545 (1887-04-01), Wagner
patent: 844157 (1907-02-01), Loughborough
patent: 1515398 (1924-11-01), Marcussen
patent: 4524522 (1985-06-01), Perry
patent: 5426859 (1995-06-01), Concari et al.

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