Granted Patent
Utility
US 5,889,698 · App. 08/860,793
Nonvolatile memory device and refreshing method
Inventors:
Hitoshi Miwa, Hiroaki Kotani
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Jul 9, 1997
Inventors
Hitoshi Miwa
Hiroaki Kotani
Assignee (at issue)
HITACHI, LTD.
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.