Granted Patent
Utility
US 5,746,551 · App. 08/674,142
Hole preparation apparatus and method of use
Inventor:
John M. Skaggs
Patented Case
View Patent ↗
Granted: May 5, 1998
Filed: Jul 1, 1996
Inventor
John M. Skaggs
Assignee (at issue)
E-Systems, 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.