Granted Patent
Utility
US 6,459,330 · App. 09/768,776
DC-DC voltage boosting method and power supply circuit using the same
Inventor:
Tadashi Yasue
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Jan 23, 2001
Inventor
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.