Granted Patent
Utility
US 4,685,359 · App. 06/893,112
Method of hardfacing steel bodied bits
Inventors:
Steven J. Worthen, James D. Oursler
Patented Case
View Patent ↗
Granted: Aug 11, 1987
Filed: Aug 4, 1986
Inventors
Steven J. Worthen
James D. Oursler
Assignee (at issue)
Hughes Tool Company - USA
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.