Granted Patent
Utility
US 5,909,141 · App. 08/874,351
Step-up potential supply circuit and semiconductor storage device
Inventor:
Shigeki Tomishima
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Jun 13, 1997
Inventor
Shigeki Tomishima
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.