Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889743 | Method for continuous tartar separation | Toshiaki Tazawa, Hiroshi Tanahashi, Yuzuru Wakabayashi | 1989-12-26 |
| 4819552 | Apparatus for continuous tartar separation | Toshiaki Tazawa, Hiroshi Tanahashi, Yuzuru Wakabayashi | 1989-04-11 |
| 4798131 | Method and apparatus for tartars separation | Naotake Ohta, Haruo Nishino, Hiroshi Tanahashi, Hajime Kato, Toshiaki Tazawa +2 more | 1989-01-17 |