Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871461 | Polymer composite membrane | Yasushi Maeda, Michio Tsuyumoto | 1989-10-03 |
| 4824573 | Crosslinked composite membrane and process for producing the same | Zenjiro Honda, Hajime Komada | 1989-04-25 |