Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6723469 | Alkaline battery without mercury and electronic apparatus powered thereby | Shunji Watanabe, Tsugio Sakai | 2004-04-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6723469 | Alkaline battery without mercury and electronic apparatus powered thereby | Shunji Watanabe, Tsugio Sakai | 2004-04-20 |