Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Weight – force or density
Patent
1992-06-15
1993-12-28
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Weight, force or density
Patent
active
D03426890
REFERENCES:
patent: 549534 (1895-12-01), Riess
patent: 593927 (1987-11-01), Dodge
patent: 2837327 (1958-06-01), Eiffert
patent: 2890036 (1959-06-01), Stelzer
patent: 4420056 (1983-12-01), Chapman
patent: 4624332 (1986-11-01), Mills
patent: 4961472 (1990-10-01), Pratt
Barnard Ralph R.
Brown Michael F.
Davis Antoine D.
Holtje Nelson C.
Michaels Christopher A.
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