Granted Patent
Utility
US 6,501,321 · App. 09/971,457
Level shift circuit
Inventor:
Naoki Kumagai
Patented Case
View Patent ↗
Granted: Dec 31, 2002
Filed: Oct 5, 2001
Inventor
Naoki Kumagai
Assignee (at issue)
FUJI 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.