Carpenter's level

Details Carpenter's level Carpenter's level

1991-04-11

1992-11-03

Douglas, Alan P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03306828

REFERENCES:
patent: Re32962 (1989-06-01), Tudek
patent: D283515 (1986-04-01), Li
patent: D284199 (1986-06-01), Li
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patent: 3861052 (1975-01-01), Siegfried
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patent: 4574491 (1986-03-01), Vining
patent: 4625423 (1986-12-01), Sackett
patent: 4648185 (1987-03-01), Brandimarte
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patent: 4805315 (1989-02-01), Nesbitt
patent: 4839833 (1989-06-01), Pachiskari
Stabila, box level, applicant supplied.
Tajima, level, applicant supplied.

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