Granted Patent
Utility
US 5,456,329 · App. 08/197,934
Bifurcated drill bit construction
Inventors:
Thomas M. Dennis, Mark Hunt
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Feb 16, 1994
Inventors
Thomas M. Dennis
Mark Hunt
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.