Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808683 | Vinylamine copolymer, flocculating agent using the same, and process for preparing the same | Takaharu Itagaki, Shigeru Sawayama, Kohichi Satoh | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808683 | Vinylamine copolymer, flocculating agent using the same, and process for preparing the same | Takaharu Itagaki, Shigeru Sawayama, Kohichi Satoh | 1989-02-28 |