Granted Patent
Utility
US 6,831,432 · App. 10/307,983
Motor driving device and motor driving method
Inventor:
Maki Murakami
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Dec 3, 2002
Inventor
Maki Murakami
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.