Granted Patent
Utility
US 6,349,779 · App. 09/497,197
Profiled element for rotary drilling equipment and drill rod comprising at least one profiled portion
Inventor:
Boulet Jean Gilbert
Patented Case
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Granted: Feb 26, 2002
Filed: Feb 3, 2000
Inventor
Boulet Jean Gilbert
Assignee (at issue)
S.M.F. International
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.