Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Weight – force or density
Patent
1980-03-17
1982-01-19
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Weight, force or density
D10 83, D1004
Patent
active
D02626934
REFERENCES:
patent: D98977 (1936-03-01), Bennett
patent: D186243 (1959-09-01), Moore et al.
patent: 2132736 (1938-10-01), Jones
patent: 3057421 (1962-10-01), Fann
patent: 3747415 (1973-07-01), Nickles et al.
Beavers Lucian Wayne
Halliburton Services
Holtje Nelson C.
Tregoning John H.
Weaver Thomas R.
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