Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Weight – force or density
Patent
1977-10-06
1979-07-17
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Weight, force or density
D1004
Patent
active
D02523817
REFERENCES:
patent: 2450188 (1948-09-01), DeGraaf
patent: 2689408 (1954-09-01), Cornell
patent: 2789356 (1957-04-01), Blanks
patent: 2983138 (1961-05-01), Delker
patent: 3455154 (1969-07-01), Cetran
patent: 3498120 (1970-03-01), MacMillan
patent: 3839908 (1974-10-01), Casper
Holtje Nelson C.
Rambo William S.
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