Granted Patent
Utility
US 6,633,192 · App. 09/930,884
Level shift circuit and semiconductor device using the same
Inventor:
Masahiko Tsuchiya
Patented Case
View Patent ↗
Granted: Oct 14, 2003
Filed: Aug 14, 2001
Inventor
Masahiko Tsuchiya
Assignee (at issue)
SEIKO EPSON 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.