Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1990-04-23
1992-07-28
Walsh, Donald P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D10 46, D10 78
Patent
active
D03282570
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"3D-301A Pipe-Cable Locator/Tracer" brochure.
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"TELTRAK 2001", Metrotech brochure.
"Dynatel Locator--573DX and 573D Sheath Fruit/Cable Locators--500D Cable Locator".
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"RD800: Guided Boring Tool Monitor".
Babkes Mitchell H.
Baugh Benjamin C.
Bieberdorf John W.
Ormand Tommy K.
Davis Antoine D.
The Charles Machine Works, Inc.
Walsh Donald P.
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