Granted Patent
Utility
US 6,281,668 · App. 09/251,609
Switching regulator control circuit of PFM system and switching regulator thereof
Inventor:
Minoru Sudo
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Feb 17, 1999
Inventor
Minoru Sudo
Assignee (at issue)
SEIKO INSTRUMENTS INC.
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.