Granted Patent
Utility
US 5,981,982 · App. 08/847,614
Dual gated power electronic switching devices
Inventor:
John C. Driscoll
Patented Case
View Patent ↗
Granted: Nov 9, 1999
Filed: Apr 28, 1997
Inventor
John C. Driscoll
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.