Granted Patent
Utility
US 5,379,854 · App. 08/108,071
Cutting element for drill bits
Inventor:
Thomas M. Dennis
Patented Case
View Patent ↗
Granted: Jan 10, 1995
Filed: Aug 17, 1993
Inventor
Thomas M. Dennis
Assignee (at issue)
Dennis Tool Company
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.