Granted Patent
Utility
US 6,370,049 · App. 09/806,995
Inverter arrangement with three one-phase autotransformers
Inventor:
Samuli Heikkila
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Apr 6, 2001
Inventor
Samuli Heikkila
Assignee (at issue)
ABB Industries Oy
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.