Granted Patent
Utility
US 6,811,918 · App. 09/997,190
Low contact resistance PEM fuel cell
Inventors:
Richard H. Blunk, Mahmoud H. Abd Elhamid, Daniel Lisi, Youssef M. Mikhail
Patented Case
View Patent ↗
Granted: Nov 2, 2004
Filed: Nov 20, 2001
Inventors
Richard H. Blunk
Mahmoud H. Abd Elhamid
Daniel Lisi
Youssef M. Mikhail
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.