Granted Patent
Utility
US 6,143,041 · App. 08/860,128
Process for manufacturing a button type alkaline battery
Inventors:
Mutsuo Nozawa, Koji Tanno, Kazuyuki Takahashi, Morio Ishizaki
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Sep 12, 1997
Inventors
Mutsuo Nozawa
Koji Tanno
Kazuyuki Takahashi
Morio Ishizaki
Assignees (at issue)
Sii Micro Parts Ltd.
Ishizaki Press Ind. 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.