Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Temperature – humidity – atmospheric condition
Patent
1978-06-23
1980-04-22
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Temperature, humidity, atmospheric condition
D1004
Patent
active
D02547805
REFERENCES:
patent: D127325 (1941-05-01), MacCowan
patent: D135590 (1943-04-01), Brown
patent: 2930234 (1960-03-01), Harada
patent: 3054293 (1962-09-01), Friedrichs
patent: 3074275 (1963-01-01), Hobin
Holtje Nelson C.
MacKenzie Joseph C.
Roessel Theodore B.
Sybron Corporation
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