Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Weight – force or density
Patent
1977-03-14
1978-12-12
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Weight, force or density
D10 46, D1004
Patent
active
D02505142
REFERENCES:
patent: 3665758 (1972-05-01), Tiller
patent: 3808885 (1974-05-01), Carlson
patent: 3834228 (1974-09-01), Wachholz
Holtje Nelson C.
Woodard Harold R.
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