Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Temperature – humidity – atmospheric condition
Patent
1983-05-04
1985-08-20
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Temperature, humidity, atmospheric condition
Patent
active
D02801841
REFERENCES:
patent: D160672 (1950-10-01), Teague
patent: D163626 (1951-06-01), Palmquist
patent: D192232 (1962-02-01), Willinger
patent: D210804 (1968-04-01), Bieger
patent: D275084 (1984-08-01), Goldman
patent: 2879666 (1959-03-01), Brown
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