Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1990-06-26
1993-07-20
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
Patent
active
D03375366
REFERENCES:
patent: D240635 (1976-07-01), Peterson
patent: D297513 (1988-09-01), Tetrault et al.
patent: 3686954 (1972-08-01), Mott
patent: 5072391 (1991-12-01), Abe
Davis A. D.
Douglas Alan P.
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