Chalk line

Details Chalk line Chalk line

1988-11-18

1991-01-29

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 72

Patent

active

D03141560

REFERENCES:
patent: D203411 (1966-01-01), Quenot
patent: D203622 (1966-02-01), Quenot
patent: D205373 (1966-06-01), Quenot
patent: D205467 (1966-08-01), Quenot
patent: 665537 (1901-01-01), Major
patent: 1233034 (1917-07-01), Crogan
patent: 1424085 (1922-07-01), Crogan
patent: 1467840 (1923-09-01), Crogan
patent: 1491437 (1924-04-01), Taylor
patent: 2723087 (1955-11-01), Simmons
patent: 3325116 (1967-06-01), Quenot
Hardware Age News, Convex Rules, 2/1969, p. 48.

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