Granted Patent
Utility
US 6,708,921 · App. 10/120,279
Composite flapping flexure
Inventors:
John L. Sims, Patrick R. Tisdale, Ernie A. Powell
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Apr 10, 2002
Inventors
John L. Sims
Patrick R. Tisdale
Ernie A. Powell
Assignee (at issue)
Bell Helicopter Textron Inc.
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.