Granted Patent
Utility
US 6,283,408 · App. 09/468,166
Anti-vibration suspension device having a torsion spring, for a helicopter
Inventors:
David A. Ferullo, Claude Bietenhader
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Dec 21, 1999
Inventors
David A. Ferullo
Claude Bietenhader
Assignee (at issue)
EUROCOPTER
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.