Granted Patent
Utility
US 6,655,915 · App. 10/136,124
Drive system for the retraction/extension of variable diameter rotor systems
Inventor:
Yuriy Gmirya
Patented Case
View Patent ↗
Granted: Dec 2, 2003
Filed: May 1, 2002
Inventor
Yuriy Gmirya
Assignee (at issue)
SIKORSKY AIRCRAFT CORPORATION
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.