Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1990-09-24
1993-04-20
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D10 46
Patent
active
D03348946
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Davis Antoine D.
Douglas Alan P.
Lennox Thomas A.
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