Granted Patent
Utility
US 6,566,002 · App. 09/837,865
Polymer electrolyte fuel cell
Inventors:
Yasunori Yoshimoto, Mitsuo Karakane, Akira Hamada
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Apr 19, 2001
Inventors
Yasunori Yoshimoto
Mitsuo Karakane
Akira Hamada
Assignee (at issue)
SANYO ELECTRIC CO., LTD.
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.