Granted Patent
Utility
US 6,559,551 · App. 09/960,394
Starter device for fuel cell system
Inventors:
Klaus Graage, Detlef Zur Megede
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Sep 24, 2001
Inventors
Klaus Graage
Detlef Zur Megede
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.