Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1994-05-04
1995-05-09
Davis, Antoine Duval
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
Patent
active
D03581047
REFERENCES:
patent: 114634 (1871-05-01), Bailey
patent: D180356 (1957-05-01), Brower
Starrett; Bench Levels with Double Plumbs No. 132; Oct. 1947; p. 238.
Davis Antoine Duval
Woodsmith Corporation
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