Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Weight – force or density
Patent
1987-11-19
1990-12-25
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Weight, force or density
Patent
active
D03131912
REFERENCES:
patent: 2830486 (1958-04-01), Dillion
patent: 3469492 (1969-09-01), Dahl
patent: 3788186 (1974-01-01), Crites
Davis Antoinc D.
Holtje Nelson C.
Torque Tabs, Inc.
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