Granted Patent
Utility
US 5,990,642 · App. 09/092,915
Method and apparatus for driving a sensorless DC motor having a bridge-type inductance detecting circuit
Inventor:
Jong Yong Park
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Jun 8, 1998
Inventor
Jong Yong Park
Assignee (at issue)
Daewoo 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.