Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880888 | Process for producing a water-absorbent resin | Morio Nakamura, Takushi Yamamoto, Hitoshi Tanaka, Yuji Sakamoto | 1989-11-14 |
| 4863989 | Water-absorbent resin composition | Morio Nakamura, Takushi Yamamoto, Hitoshi Tanaka, Yuji Sakamoto | 1989-09-05 |