Granted Patent
Utility
US 6,778,411 · App. 10/298,473
Start-up circuit for power converters with controller power supply connected at output side
Inventor:
Fengtai Huang
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Nov 18, 2002
Inventor
Fengtai Huang
Assignee (at issue)
BALLARD POWER SYSTEMS INC.
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.