Granted Patent
Utility
US 6,828,055 · App. 09/917,500
Bipolar plates and end plates for fuel cells and methods for making the same
Inventor:
Daniel A. Kearl
Patented Case
View Patent ↗
Granted: Dec 7, 2004
Filed: Jul 27, 2001
Inventor
Daniel A. Kearl
Assignee (at issue)
Hewlett-Packard Development Company, L.P.
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.