Granted Patent
Utility
US 6,580,236 · App. 09/971,924
Brushless motor drive circuit having low noise and high efficiency
Inventor:
Tsuyoshi Mitsuda
Patented Case
View Patent ↗
Granted: Jun 17, 2003
Filed: Oct 9, 2001
Inventor
Tsuyoshi Mitsuda
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.