Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886891 | Process for preparing 1,1-disubstituted ethylene derivative by reaction of lead with a carbinol derivative | Shigeru Torii, Michio Sasaoka, Yoshihisa Tomotaki, Mitsuo Akada, Hideo Tanaka +2 more | 1989-12-12 |
| 4814320 | Heat-sensitive recording material | Hajime Kawai, Katsuhiko Tsunemitsu | 1989-03-21 |