Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Temperature – humidity – atmospheric condition
Patent
1986-02-10
1989-02-28
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Temperature, humidity, atmospheric condition
Patent
active
D03000087
REFERENCES:
patent: D175064 (1955-07-01), Bradley
patent: D184092 (1958-12-01), Kremer
patent: D187816 (1960-05-01), Woofter
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