Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1979-07-26
1982-02-16
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
D10 61, D10 74, D1004
Patent
active
D02630320
REFERENCES:
patent: 922171 (1909-05-01), Loeven
patent: 2343688 (1944-03-01), Maxey
patent: 2794263 (1957-06-01), Cranmer
patent: 3275161 (1966-09-01), Robertson
patent: 3766659 (1973-10-01), Quenot
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