Granted Patent
Utility
US 5,814,899 · App. 08/812,974
SOI-type semiconductor device with variable threshold voltages
Inventors:
Koichiro Okumura, Susumu Kurosawa
Patented Case
View Patent ↗
Granted: Sep 29, 1998
Filed: Mar 5, 1997
Inventors
Koichiro Okumura
Susumu Kurosawa
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.