Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6821678 | Process of producing manganese dioxide for a lithium primary battery | Hiroshi Sumida, Masaki Sato | 2004-11-23 |
| 5866278 | Electrolytic manganese dioxide, process for preparing the same, and manganese dry cell | Hiroshi Sumida, Takuya Inoue, Hajime Murakami, Michiko Inui, Yoshihiro Sakurai | 1999-02-02 |