Granted Patent
Utility
US 5,569,982 · App. 08/442,813
Clamping circuit for IGBT in spark plug ignition system
Inventor:
Bruno Nadd
Patented Case
View Patent ↗
Granted: Oct 29, 1996
Filed: May 17, 1995
Inventor
Bruno Nadd
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.