Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4671903 | Sulfonation method of polystyrene | Kyozo Kitano, Toshimi Terao | 1987-06-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4671903 | Sulfonation method of polystyrene | Kyozo Kitano, Toshimi Terao | 1987-06-09 |