Granted Patent
Utility
US 6,819,576 · App. 10/106,943
Power conversion apparatus and methods using balancer circuits
Inventor:
Robert W. Johnson
Patented Case
View Patent ↗
Granted: Nov 16, 2004
Filed: Mar 25, 2002
Inventor
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.