Granted Patent
Utility
US 6,504,334 · App. 09/834,664
Circuitry and method for driving a motor
Inventor:
Hisamo Sogawa
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: Apr 13, 2001
Inventor
Hisamo Sogawa
Assignee (at issue)
NEC CORPORATION
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.