Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865886 | Process for preparation of water absorptive composite material | Takeshi Shibano | 1989-09-12 |
| 4842927 | Process for preparation of water absorptive composite | Takeshi Shibano | 1989-06-27 |
| 4835020 | Process for preparation of water absorptive composite material | Takeshi Shibano | 1989-05-30 |