Granted Patent
Utility
US 5,383,526 · App. 08/116,527
Methods for rock mining with non-coring rotary tools
Inventor:
William J. Brady
Patented Case
View Patent ↗
Granted: Jan 24, 1995
Filed: Sep 7, 1993
Inventor
William J. Brady
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.