Vertical plumb tool

Details Vertical plumb tool Vertical plumb tool

1988-10-03

1992-02-18

Dunkins, Bruce W.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03239977

REFERENCES:
patent: D32156 (1900-01-01), Johnson
patent: D171317 (1954-01-01), Von Dukhe
patent: 1229356 (1917-06-01), Watkins
patent: 1308699 (1919-07-01), Cusick
patent: 1707593 (1929-04-01), Arbuckle
patent: 2624953 (1953-01-01), Newcomb
patent: 2635350 (1953-04-01), Bettega
patent: 3545091 (1970-12-01), Sebastiani
patent: 4202108 (1980-05-01), Adams, Jr. et al.
patent: 4443954 (1984-04-01), Clark
patent: 4829676 (1989-05-01), Waldron

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