Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873034 | Process for producing microporous ultra-high-molecular-weight polyolefin membrane | Kenkichi Okamoto, Rumi Iwasaki, Shuichi Sawada | 1989-10-10 |
| 4849311 | Immobilized electrolyte membrane | Takuji Itoh, Kazuo Saeki | 1989-07-18 |