Granted Patent
Utility
US 4,465,172 · App. 06/296,943
Clutch disc with a variable torsional damper
Inventor:
Sidney U. Gatewood
Patented Case
View Patent ↗
Granted: Aug 14, 1984
Filed: Aug 28, 1981
Inventor
Sidney U. Gatewood
Assignee (at issue)
BorgWarner Inc.
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.