Granted Patent
Utility
US 5,548,133 · App. 08/308,556
IGBT with increased ruggedness
Inventor:
Daniel M. Kinzer
Patented Case
View Patent ↗
Granted: Aug 20, 1996
Filed: Sep 19, 1994
Inventor
Daniel M. Kinzer
Assignee (at issue)
International Rectifier 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.