Granted Patent
Utility
US 6,743,539 · App. 10/134,991
Coolant fan control for fuel cell systems
Inventors:
Bruce J. Clingerman, Donald H. Keskula, Victor W. Logan
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Apr 29, 2002
Inventors
Bruce J. Clingerman
Donald H. Keskula
Victor W. Logan
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.