Granted Patent
Utility
US 6,290,171 · App. 09/167,613
Device for controlling a helicopter hybrid countertorque system
Inventors:
Andre-Michel Dequin, Valery Lionel Delisle
Patented Case
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Granted: Sep 18, 2001
Filed: Oct 6, 1998
Inventors
Andre-Michel Dequin
Valery Lionel Delisle
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.