Granted Patent
Utility
US 5,990,731 · App. 09/017,862
Input/output protection circuit
Inventor:
Kousuke Yoshida
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Feb 3, 1998
Inventor
Kousuke Yoshida
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.