Granted Patent
Utility
US 6,224,487 · App. 08/831,198
Two stage torsional vibration damper
Inventor:
Kenneth C. Yuergens
Patented Case
View Patent ↗
Granted: May 1, 2001
Filed: Apr 2, 1997
Inventor
Kenneth C. Yuergens
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.