Granted Patent
Utility
US 5,404,335 · App. 08/039,661
Dynamic type semiconductor memory device operable in a self-refreshing mode
Inventor:
Youichi Tobita
Patented Case
View Patent ↗
Granted: Apr 4, 1995
Filed: Mar 30, 1993
Inventor
Youichi Tobita
Assignee (at issue)
MITSUBISHI ELECTRIC 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.