Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Temperature – humidity – atmospheric condition
Patent
1985-11-27
1988-09-06
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Temperature, humidity, atmospheric condition
D10 56
Patent
active
D02975149
REFERENCES:
patent: D179690 (1957-02-01), Krapp
patent: D224987 (1972-10-01), Sato
patent: D234419 (1975-03-01), Hofstetter
patent: D260497 (1981-09-01), Howard
patent: D266316 (1982-09-01), DuVall
patent: 3914982 (1975-10-01), Zanetti
Hygrodynamics.RTM., Precision Humidity and Control Instrumentation catalog 672D, Oct. 1980.
Holtje Nelson C.
Hygrodynamics, Inc.
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