Granted Patent
Utility
US 6,000,911 · App. 08/972,274
Blade with swept-back tip for the rotary wings of an aircraft
Inventors:
Francois Toulmay, Joelle Marguerite Zibi
Patented Case
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Granted: Dec 14, 1999
Filed: Nov 18, 1997
Inventors
Francois Toulmay
Joelle Marguerite Zibi
Assignees (at issue)
EUROCOPTER
ONERA
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.