Granted Patent
Utility
US 5,182,621 · App. 07/677,618
Input protection circuit for analog/digital converting semiconductor
Inventor:
Kiyonobu Hinooka
Patented Case
View Patent ↗
Granted: Jan 26, 1993
Filed: Mar 27, 1991
Inventor
Kiyonobu Hinooka
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.