Granted Patent
Utility
US 6,411,066 · App. 09/784,440
Method to control the flow of active power in a high voltage direct current transmission system and device for the same
Inventor:
Ying Jiang-Häfner
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Apr 19, 2001
Inventor
Ying Jiang-Häfner
Assignee (at issue)
ABB AB
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.