Temperature and humidity indicator

Details Temperature and humidity indicator Temperature and humidity indicator

1985-08-12

1988-08-16

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Temperature, humidity, atmospheric condition

Patent

active

D02972174

REFERENCES:
patent: D142431 (1945-09-01), Lewis
patent: D151959 (1948-12-01), Bowers
patent: D187669 (1960-04-01), Monson
patent: D201452 (1965-06-01), Shipley
patent: D223211 (1972-03-01), Laughlin
patent: D242329 (1976-11-01), Van Kersen
patent: D259184 (1981-05-01), Francis
patent: D288536 (1987-03-01), Tanaka
patent: 2093767 (1937-09-01), Rollefson
patent: 3521488 (1970-07-01), Preiser
patent: 4384416 (1983-05-01), Kanzenberger

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