Multi-purpose square

Details Multi-purpose square Multi-purpose square

1982-06-30

1984-11-13

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D02763168

REFERENCES:
patent: D213643 (1969-03-01), Gutowski
patent: D224044 (1972-06-01), Carter
patent: D233695 (1974-11-01), Payne
patent: 2570356 (1951-10-01), Luis
patent: 2728990 (1956-01-01), Murch
patent: 3513558 (1970-05-01), Kuchta
patent: 4380872 (1983-04-01), Moran

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