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Patents

As notice under 35 U.S.C. § 287(a), we have posted a list of many of our products that are covered by one or more U.S. patents, or whose use is covered by such patents.  The patents listed here apply to the U.S. only.  If a product is not specifically identified on this web site or it is not otherwise marked with a patent number, then we are not currently marking it or it is not currently covered by a U.S. patent.

  • Virtual Marking Sheet Downhole
  • Virtual Marking Sheet Completion Tools
  • Virtual Marking Sheet Grant Prideco
  • Virtual Marking Sheet WellSite Services
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