Granted Patent
Utility
US 6,756,142 · App. 09/999,387
Fuel cell using non-linear positive temperature coefficient material
Inventors:
Sivakumar Muthuswamy, Steven D. Pratt, Ronald Kelley
Patented Case
View Patent ↗
Granted: Jun 29, 2004
Filed: Oct 31, 2001
Inventors
Sivakumar Muthuswamy
Steven D. Pratt
Ronald Kelley
Assignee (at issue)
Motorola, 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.