Granted Patent
Utility
US 4,255,757 · App. 05/966,644
High reverse voltage semiconductor device with fast recovery time with central depression
Inventor:
Boris Hikin
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Dec 5, 1978
Inventor
Boris Hikin
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.