T-square

Details T-square T-square

1987-08-28

1991-01-01

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03133591

REFERENCES:
patent: D172945 (1954-09-01), Baker
patent: 2104515 (1938-01-01), Golden
patent: 2390544 (1945-12-01), Lamb

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