Carpenter's square

Details Carpenter's square Carpenter's square

1993-06-18

1994-12-06

Douglas, Alan

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03531112

REFERENCES:
patent: 24011 (1895-02-01), Rebell
patent: 24503 (1895-07-01), Starrett
patent: 4327501 (1982-05-01), Hurt
patent: 4503624 (1985-03-01), Whiteford
patent: 4700489 (1987-10-01), Vasile
patent: 4944096 (1990-07-01), Tolley
Starrett; Graduated Hardened Steel Squares No. 63; Oct. 1947; p. 64.

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