Granted Patent
Utility
US 6,777,898 · App. 10/233,725
Methods and apparatus for maintaining synchronization of a polyphase motor during power interruptions
Inventor:
William A. Peterson, Jr.
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Sep 3, 2002
Inventor
William A. Peterson, Jr.
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.