Granted Patent
Utility
US 4,659,976 · App. 06/726,709
Method and apparatus for maximizing utilization of an electric motor under load
Inventor:
Fredrick R. Johanson
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Apr 24, 1985
Inventor
Fredrick R. Johanson
Assignee (at issue)
Dresser Industries, 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.