Granted Patent
Utility
US 6,504,345 · App. 09/854,345
Charge/discharge control circuit and charging type power supply device
Inventors:
Atsushi Sakurai, Koichi Yamasaki
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: May 11, 2001
Inventors
Atsushi Sakurai
Koichi Yamasaki
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.