Granted Patent
Utility
US 6,476,591 · App. 09/977,941
Power supply device for driving liquid crystal, liquid crystal device and electronic equipment using the same
Inventors:
Hisashi Yamaguchi, Tadashi Yasue
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Oct 17, 2001
Inventors
Hisashi Yamaguchi
Tadashi Yasue
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.