T-square with centering ruler

Details T-square with centering ruler T-square with centering ruler

1988-07-25

1991-02-19

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 65

Patent

active

D03147126

REFERENCES:
patent: D199807 (1964-12-01), Wilson
patent: D255784 (1980-07-01), Seely, Jr.
patent: D282828 (1986-03-01), Holder
patent: 1107432 (1914-08-01), Mantz
patent: 1298995 (1919-04-01), Michalovitz
patent: 2238581 (1941-04-01), De Lisle
patent: 4825559 (1989-05-01), Santos

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