Granted Patent
Utility
US 6,764,781 · App. 10/074,671
Intermittent cooling of fuel cell
Inventor:
Martin Hoch
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Feb 13, 2002
Inventor
Martin Hoch
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.