Granted Patent
Utility
US 6,490,182 · App. 09/972,981
Power conversion apparatus
Inventors:
Shuji Katoh, Hiromitsu Sakai, Shigeta Ueda, Tomomichi Ito, Hidetoshi Aizawa
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: Oct 10, 2001
Inventors
Shuji Katoh
Hiromitsu Sakai
Shigeta Ueda
Tomomichi Ito
Hidetoshi Aizawa
Assignee (at issue)
HITACHI, 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.