Granted Patent
Utility
US 6,771,039 · App. 10/329,438
Motor control apparatus and method
Inventors:
Yoshimi Sakurai, Yoshitaka Iwaji, Ryoso Masaki
Patented Case
View Patent ↗
Granted: Aug 3, 2004
Filed: Dec 27, 2002
Inventors
Yoshimi Sakurai
Yoshitaka Iwaji
Ryoso Masaki
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.