Granted Patent
Utility
US 6,576,359 · App. 09/990,728
Controlled air injection for a fuel cell system
Inventor:
Matthew H. Fronk
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Nov 14, 2001
Inventor
Matthew H. Fronk
Assignee (at issue)
General Motors LLC
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.