Granted Patent
Utility
US 4,420,865 · App. 06/318,909
Method for rethreading tubular members
Inventor:
Jerry Haygood
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Nov 6, 1981
Inventor
Jerry Haygood
Assignee (at issue)
Reed Tubular Products Company
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.