Granted Patent
Utility
US 5,155,054 · App. 07/775,444
Method of manufacturing a semiconductor MOSFET having a projection T-shaped semiconductor portion
Inventor:
Masahiro Itoh
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Oct 15, 1991
Inventor
Masahiro Itoh
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.