Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Temperature – humidity – atmospheric condition
Patent
1976-11-15
1979-01-23
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Temperature, humidity, atmospheric condition
D1004
Patent
active
D02508826
REFERENCES:
patent: D242603 (1976-12-01), Horton
Electronic Technician/Dealer, 1/75, p. 42--Multimeter at top center.
Retailing Home Furnishings, 1/17/77--Sec. 3--p. 54--Soil Moisture Sensor at left.
Holtje Nelson C.
Robbins Leonard J.
Substral International, Pernille S.A.
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