Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1986-12-01
1989-11-28
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
D10 62
Patent
active
D03048080
REFERENCES:
patent: 1380269 (1921-05-01), Sumersille
patent: 2278440 (1942-04-01), Graves
patent: 4038751 (1977-08-01), Albright
patent: 4060900 (1977-12-01), Greenwood
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