Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5284909 | Amphoteric polyelectrolyte, method for production thereof, and organic sludge dehydrater | Kazutomo Takahashi, Koichi Yamamoto, Kazuo Kodama, Seiichi Suzuki, Yutaka Morimoto +1 more | 1994-02-08 |
| 5194515 | Amphoteric polyelectrolite, method for production thereof, and organic sludge dehydrater | Kazutomo Takahashi, Koichi Yamamoto, Kazuo Kodama, Seiichi Suzuki, Yutaka Morimoto +1 more | 1993-03-16 |