Granted Patent
Utility
US 5,270,230 · App. 07/952,989
Method for making a conductivity modulation MOSFET
Inventor:
Kenya Sakurai
Patented Case
View Patent ↗
Granted: Dec 14, 1993
Filed: Sep 29, 1992
Inventor
Kenya Sakurai
Assignee (at issue)
FUJI ELECTRIC CO., LTD.
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.