Granted Patent
Utility
US 4,780,853 · App. 06/918,179
Memory device
Inventor:
Yasumasa Yamada
Patented Case
View Patent ↗
Granted: Oct 25, 1988
Filed: Oct 14, 1986
Inventor
Yasumasa Yamada
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.