Granted Patent
Utility
US 6,747,378 · App. 09/933,496
Dual stiffness bearing damping system
Inventor:
Norman C. Brackett
Patented Case
View Patent ↗
Granted: Jun 8, 2004
Filed: Aug 20, 2001
Inventor
Norman C. Brackett
Assignee (at issue)
Beacon Power, LLC
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.