Granted Patent
Utility
US 5,134,451 · App. 07/509,478
MOS semiconductive device
Inventor:
Teruo Katoh
Patented Case
View Patent ↗
Granted: Jul 28, 1992
Filed: Apr 13, 1990
Inventor
Teruo Katoh
Assignee (at issue)
OKI ELECTRIC INDUSTRY 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.