Granted Patent
Utility
US 4,185,728 · App. 05/842,135
Clutch disc with variable deflection rate vibration damper
Inventor:
Sidney U. Gatewood
Patented Case
View Patent ↗
Granted: Jan 29, 1980
Filed: Oct 14, 1977
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.