Granted Patent
Utility
US 6,579,640 · App. 09/670,193
Sealed rectangular battery and manufacturing method for the same
Inventors:
Takashi Nagase, Takeo Hamamatsu, Masao Inoue, Hideyuki Asanuma, Naoyoshi Hinotsu
Patented Case
View Patent ↗
Granted: Jun 17, 2003
Filed: Sep 26, 2000
Inventors
Takashi Nagase
Takeo Hamamatsu
Masao Inoue
Hideyuki Asanuma
Naoyoshi Hinotsu
Assignee (at issue)
SANYO ELECTRIC 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.