Granted Patent
Utility
US 4,871,286 · App. 07/348,140
Grooving or threading tool
Inventor:
Carl E. Hunt
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: May 5, 1989
Inventor
Carl E. Hunt
Assignee (at issue)
GTE Valenite Corporation
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.