Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Weight – force or density
Patent
1990-07-27
1993-07-20
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Weight, force or density
Patent
active
D03375374
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patent: 4916944 (1990-04-01), Ho-Chuan
Davis A. D.
Douglas Alan P.
Gilden Leon
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