Granted Patent
Utility
US 6,239,581 · App. 09/450,158
Battery state monitoring circuit and battery device
Inventor:
Shinichi Yoshida
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Nov 29, 1999
Inventor
Shinichi Yoshida
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.