Inventor
CAMPBELL MICHAEL R
US4 patents
Patents
4 patentsUS7624816B2Dec 1, 2009
Configurable beacon and method
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Configurable beacon and method
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US7150331B2Dec 19, 2006
System and method for tracking and communicating with a boring tool
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US7350594B2Apr 1, 2008
System and method for tracking and communicating with a boring tool
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