Granted Patent
Utility
US 6,444,345 · App. 09/761,660
Fuel cell system
Inventor:
Jochen Sang
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Jan 18, 2001
Inventor
Jochen Sang
Assignee (at issue)
XCELLSiS GmbH
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.