Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1985-05-06
1988-01-19
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D14 59, D10 78
Patent
active
D02937719
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Dubuc Jean H.
Holtje Nelson C.
Pre-Test Electronique Inc.
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