Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845268 | Halogen-containing polyether | Yohnosuke Ohsaka, Shoji Takaki | 1989-07-04 |
| 4836944 | Halogen-containing polyether and its use | Sueyoshi Ishikawa, Katsuyoshi Kubo, Yoshitaka Honda, Yukio Ohmure, Norio Kataoka | 1989-06-06 |