Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Weight – force or density
Patent
1990-08-22
1993-04-20
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Weight, force or density
Patent
active
D03348954
REFERENCES:
patent: D269600 (1983-07-01), Mox
patent: 1850179 (1932-03-01), Merchen
patent: 3592277 (1971-07-01), Ackeret
patent: 4792002 (1988-12-01), Ward
Davis Antoine O.
Douglas Alan P.
Gilden Leon
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