Granted Patent
Utility
US 5,227,697 · App. 07/618,800
Dynamic type semiconductor memory
Inventor:
Masahiko Sakagami
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Nov 28, 1990
Inventor
Masahiko Sakagami
Assignee (at issue)
Matsushita Electric Co., 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.