Issued Patents 1994
Showing 1–1 of 1 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, Takashi Tazaki +1 more | 1994-02-08 |