Granted Patent
Utility
US 4,708,513 · App. 06/773,031
Fatigue resistant coupling for tubular members
Inventors:
Joseph R. Roche, Shaw-Wen Lin
Patented Case
View Patent ↗
Granted: Nov 24, 1987
Filed: Sep 6, 1985
Inventors
Joseph R. Roche
Shaw-Wen Lin
Assignee (at issue)
Hydril 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.