Granted Patent
Utility
US 6,069,412 · App. 08/038,469
Power factor corrected UPS with improved connection of battery to neutral
Inventors:
William J. Raddi, Joseph C. Paulakonis, Robert W. Johnson
Patented Case
View Patent ↗
Granted: May 30, 2000
Filed: Mar 29, 1993
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.