Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4891236 | Method for tartar separation | Masahiro Yotsumoto, Haruo Nishino, Hiroshi Tanahashi, Hajime Kato, Toshiaki Tazawa +2 more | 1990-01-02 |
| 4798131 | Method and apparatus for tartars separation | Masahiro Yotsumoto, Haruo Nishino, Hiroshi Tanahashi, Hajime Kato, Toshiaki Tazawa +2 more | 1989-01-17 |