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Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US396455610 Jul 197422 Jun 1976Gearhart-Owen Industries, Inc.Downhole signaling system
US420681020 Jun 197810 Jun 1980Halliburton CompanyMethod and apparatus for indicating the downhole arrival of a well tool
US430399412 Apr 19791 Dec 1981Schlumberger Technology CorporationSystem and method for monitoring drill string characteristics during drilling
US447956430 Nov 198130 Oct 1984Schlumberger Technology CorporationSystem and method for monitoring drill string characteristics during drilling
US569257625 Oct 19952 Dec 1997Tracto -Technik Paul Schmidt Spezialmaschinen KGLocating device for percussion boring machines
US631179023 May 20006 Nov 2001The Charles Machines Works, Inc.Removable boring head with tapered shank connector