Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5707541 | Preparation of ferrite from used dry cells | Takaaki Iwasaki, Shigeaki Suda, Takeo Kitagawa | 1998-01-13 |
| 5498360 | Process for recycling used-up dry cells, and ferrite production process | Takaaki Iwasaki, Toshio Saito, Shigeaki Suda, Takeo Kitagawa | 1996-03-12 |