Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4386172 | Water-swellable composition and leakage preventing material therewith | Yoshihiro Yoshioka, Hiroshi Harima | 1983-05-31 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4386172 | Water-swellable composition and leakage preventing material therewith | Yoshihiro Yoshioka, Hiroshi Harima | 1983-05-31 |