Granted Patent
Utility
US 4,704,652 · App. 06/822,715
Hybrid electrical power controller
Inventor:
William W. Billings
Patented Case
View Patent ↗
Granted: Nov 3, 1987
Filed: Jan 27, 1986
Inventor
William W. Billings
Assignee (at issue)
Westinghouse Electric Company LLC
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.