Granted Patent
Utility
US 6,641,944 · App. 09/973,985
Fuel cell drive system
Inventors:
Emi Kawasumi, Yasukazu Iwasaki
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Oct 11, 2001
Inventors
Emi Kawasumi
Yasukazu Iwasaki
Assignee (at issue)
Nissan Motor 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.