Granted Patent
Utility
US 4,965,722 · App. 07/441,577
Dynamic memory refresh circuit with a flexible refresh delay dynamic memory
Inventor:
Takahiro Tokuume
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Nov 27, 1989
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.