Granted Patent
Utility
US 5,619,797 · App. 08/422,314
Flow-straightener vane for counter-torque device with ducted rotor and ducted flow-straightening stator, for helicopter
Inventors:
Henri F. Barquet, Remy-Elian Arnaud
Patented Case
View Patent ↗
Granted: Apr 15, 1997
Filed: Apr 13, 1995
Inventors
Henri F. Barquet
Remy-Elian Arnaud
Assignee (at issue)
Eurocopter France
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.