Triangle

Details Triangle Triangle

1993-09-09

1994-07-26

Douglas, Alan P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 65

Patent

active

D03490645

REFERENCES:
patent: D136091 (1943-08-01), Tripp
patent: 1619427 (1927-03-01), McCaffery, Jr.
patent: 2605550 (1952-08-01), Campbell

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