Granted Patent
Utility
US 4,990,976 · App. 07/274,918
Semiconductor device including a field effect transistor having a protective diode between source and drain thereof
Inventor:
Masayuki Hattori
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Nov 22, 1988
Inventor
Masayuki Hattori
Assignee (at issue)
NEC 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.