Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863524 | Method of cleaning the interior of polymerization reactor | Toragoro Mitani, Hiroaki Yamauchi, Hideo Yasui | 1989-09-05 |
| 4805650 | Apparatus for cleaning a tank-like vessel | Hideo Yasui, Toragoro Mitani | 1989-02-21 |
| 4795800 | Scale deposition preventing agent | Hiroaki Yamauchi, Toragoro Mitani | 1989-01-03 |