Granted Patent
Utility
US 5,998,974 · App. 09/196,701
Charge/discharge control circuit and chargeable electric power source apparatus
Inventors:
Minoru Sudo, Takayuki Takashina, Yoshikazu Kojima, Sadashi Shimoda, Hiroshi Mukainakano
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Nov 20, 1998
Inventors
Minoru Sudo
Takayuki Takashina
Yoshikazu Kojima
Sadashi Shimoda
Hiroshi Mukainakano
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.