Granted Patent
Utility
US 6,293,740 · App. 09/387,975
Threading tool
Inventor:
Paul Schulte
Patented Case
View Patent ↗
Granted: Sep 25, 2001
Filed: Sep 1, 1999
Inventor
Paul Schulte
Assignee (at issue)
Northern Tool Sales & Service Co.
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.