Quoin corner guide

Details Quoin corner guide Quoin corner guide

1991-10-18

1993-10-12

Douglas, Alan P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03401936

REFERENCES:
patent: 1415615 (1922-05-01), Stock
patent: 2143237 (1939-01-01), Byrnes
patent: 2623290 (1952-12-01), Kampel
patent: 2785467 (1957-03-01), Andersen
patent: 3127684 (1964-04-01), Ernst
patent: 4569179 (1986-02-01), Post

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