Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Temperature – humidity – atmospheric condition
Patent
1991-12-09
1993-08-10
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Temperature, humidity, atmospheric condition
Patent
active
D03381625
REFERENCES:
patent: D331024 (1992-11-01), DeRidder
patent: 3855863 (1974-12-01), Kuehn et al.
Davis A. D.
Douglas Alan P.
Litman Richard C.
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