Granted Patent
Utility
US 6,176,679 · App. 09/006,504
Rotor with folding blades, for the rotary wings of an aircraft
Inventor:
Claude Bietenhader
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: Jan 14, 1998
Inventor
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.