Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4558875 | Aqueously-swelling water stopper and a process for stopping water thereby | Takeshi Kobayashi | 1985-12-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4558875 | Aqueously-swelling water stopper and a process for stopping water thereby | Takeshi Kobayashi | 1985-12-17 |