Granted Patent
Utility
US 5,585,708 · App. 08/384,628
Four quadrant motor controller minimizing distortion index
Inventors:
Robert D. Richardson, William L. Erdman
Patented Case
View Patent ↗
Granted: Dec 17, 1996
Filed: Feb 6, 1995
Inventors
Robert D. Richardson
William L. Erdman
Assignee (at issue)
Kenetech Windpower, 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.