Granted Patent
Utility
US 5,204,989 · App. 07/698,555
Charge sensing device
Inventor:
Junichi Yamamoto
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: May 10, 1991
Inventor
Junichi Yamamoto
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.