Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Temperature – humidity – atmospheric condition
Patent
1981-04-28
1983-09-06
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Temperature, humidity, atmospheric condition
D1004
Patent
active
D02704315
REFERENCES:
patent: D18405 (1888-06-01), Weiland
patent: D34894 (1901-08-01), Mayer
patent: D78580 (1929-05-01), McClintock
patent: D127325 (1941-05-01), MacCowan
patent: D196673 (1963-10-01), Chisham
patent: D234534 (1975-03-01), Davidson
patent: 1345687 (1920-07-01), Milker
patent: 3196684 (1965-07-01), Vernon
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