Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5672506 | Sludge treatment tank and construction method thereof | Keitaro Aoyagi, Sadao Niibe, Toshitomi Umegae, Hideo Iwai | 1997-09-30 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5672506 | Sludge treatment tank and construction method thereof | Keitaro Aoyagi, Sadao Niibe, Toshitomi Umegae, Hideo Iwai | 1997-09-30 |