Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880888 | Process for producing a water-absorbent resin | Shigeji Obayashi, Takushi Yamamoto, Hitoshi Tanaka, Yuji Sakamoto | 1989-11-14 |
| 4863989 | Water-absorbent resin composition | Shigeji Obayashi, Takushi Yamamoto, Hitoshi Tanaka, Yuji Sakamoto | 1989-09-05 |
| 4810419 | Shaped electroconductive aromatic imide polymer article and process for producing | Akihiro Kunimoto, Seiichirou Takabayashi, Tatuaki Maeda | 1989-03-07 |