Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863972 | Porous cross-linked polyvinyl alcohol particles, process for producing the same, and separating agent composed of the same | Takaharu Itagaki, Eiji Miyata, Takayuki Tashiro | 1989-09-05 |
| 4851382 | Separation medium | Hideaki Kiniwa, Akihiro Shimura, Masahiko Annaka | 1989-07-25 |