Granted Patent
Utility
US 6,299,382 · App. 08/709,981
Method for installing an underground pipe
Inventor:
Steven W. Wentworth
Patented Case
View Patent ↗
Granted: Oct 9, 2001
Filed: Sep 20, 1996
Inventor
Steven W. Wentworth
Assignee (at issue)
Earth Tool Company LLC
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.