Granted Patent
Utility
US 4,924,381 · App. 07/228,880
Microprocessor having a dynamic memory refresh circuit
Inventor:
Takahiro Tokuume
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Aug 5, 1988
Inventor
Takahiro Tokuume
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.