Granted Patent
Utility
US 6,191,968 · App. 09/533,510
Wye connected 3-phase to 9-phase auto-transformer with reduced winding currents
Inventor:
Derek A. Paice
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Mar 23, 2000
Inventor
Derek A. Paice
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.