Granted Patent
Utility
US 6,580,253 · App. 10/213,262
Boosting and step-down switching regulator controlling circuit and boosting and step-down switching regulator for use in the same
Inventors:
Yoshihide Kanakubo, Tomohiro Oka, Takeshi Naka
Patented Case
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Granted: Jun 17, 2003
Filed: Aug 6, 2002
Inventors
Yoshihide Kanakubo
Tomohiro Oka
Takeshi Naka
Assignees (at issue)
SEIKO INSTRUMENTS INC.
Device Engineering 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.