Granted Patent
Utility
US 5,905,321 · App. 09/024,750
Energy storage flywheel apparatus and methods
Inventors:
David B. Clifton, Joseph F. Pinkerton, James A. Andrews, Scott R. Little
Patented Case
View Patent ↗
Granted: May 18, 1999
Filed: Feb 17, 1998
Inventors
David B. Clifton
Joseph F. Pinkerton
James A. Andrews
Scott R. Little
Assignee (at issue)
Active Power, 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.