Ruler

Details Ruler Ruler

1996-02-12

1996-12-10

Davis, Antoine Duval

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03763269

REFERENCES:
patent: D168834 (1953-02-01), Farinacci
patent: 344721 (1886-06-01), Cheney
patent: 706242 (1902-08-01), Latshaw
patent: 799818 (1905-09-01), Wood
patent: 809950 (1906-01-01), Heysinger et al.
patent: 1488435 (1924-03-01), Pickens
patent: 1776245 (1930-09-01), Barrett
patent: 4778390 (1988-10-01), Marans
patent: 4842521 (1989-06-01), Johansen

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