Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886581 | Removal of hydrogen fluoride from 2,2,3,3-tetra-fluorooxetane | Yohnosuke Ohsaka, Hiroo Sakai | 1989-12-12 |
| 4845268 | Halogen-containing polyether | Yohnosuke Ohsaka, Takashi Tohzuka | 1989-07-04 |