Granted Patent
Utility
US 4,853,896 · App. 07/060,146
Write driver circuit of semiconductor memory device
Inventor:
Takashi Yamaguchi
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Jun 10, 1987
Inventor
Takashi Yamaguchi
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.