Granted Patent
Utility
US 6,667,598 · App. 10/109,250
Circuit for generating three-phase PWM signal
Inventor:
Kazunari Shimohara
Patented Case
View Patent ↗
Granted: Dec 23, 2003
Filed: Mar 28, 2002
Inventor
Kazunari Shimohara
Assignee (at issue)
NEC Electronics 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.