Granted Patent
Utility
US 6,329,094 · App. 09/423,168
Polymer electrolyte fuel cell showing stable and outstanding electric-power generating characteristics
Inventors:
Takashi Yasuo, Toru Nakaoka, Akira Hamada, Yasuo Miyake, Yasunori Yoshimoto, Mitsuo Karakane
Patented Case
View Patent ↗
Granted: Dec 11, 2001
Filed: Nov 3, 1999
Inventors
Takashi Yasuo
Toru Nakaoka
Akira Hamada
Yasuo Miyake
Yasunori Yoshimoto
Mitsuo Karakane
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.