Granted Patent
Utility
US 4,672,583 · App. 06/620,984
Dynamic random access memory device provided with test circuit for internal refresh circuit
Inventor:
Kazuo Nakaizumi
Patented Case
View Patent ↗
Granted: Jun 9, 1987
Filed: Jun 15, 1984
Inventor
Kazuo Nakaizumi
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.