Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1979-03-19
1981-09-29
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
414698, 172430, D1004
Patent
active
D02609720
REFERENCES:
patent: 2437805 (1948-03-01), Chilcote
patent: 2503408 (1950-04-01), Phillips
patent: 2700828 (1955-02-01), Barns
patent: 3349747 (1967-10-01), Vande Wiele
patent: 4129224 (1978-12-01), Teach
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