Granted Patent
Utility
US 5,469,926 · App. 08/231,237
Directional boring drill bit blade
Inventor:
Willie J. Lessard
Patented Case
View Patent ↗
Granted: Nov 28, 1995
Filed: Apr 22, 1994
Inventor
Willie J. Lessard
Assignee (at issue)
bor-mor, Inc.
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.