Granted Patent
Utility
US 6,749,152 · App. 10/237,419
Method and device for avoiding a collision of a rotating rotor blade of a rotary-wing aircraft with blade vortex
Inventors:
Marius Bebesel, Reinhard Pongratz, Dieter Roth
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Sep 9, 2002
Inventors
Marius Bebesel
Reinhard Pongratz
Dieter Roth
Assignee (at issue)
Eurocopter Deutschland GmbH
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.