Granted Patent
Utility
US 6,661,678 · App. 10/151,449
Power factor corrected UPS with improved connection of battery to neutral and methods of operation thereof
Inventors:
William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson
Patented Case
View Patent ↗
Granted: Dec 9, 2003
Filed: May 20, 2002
Inventors
William J. Raddi
Joseph C. Paulakonis
Robert W. Johnson
Assignee (at issue)
Powerware 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.