Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831110 | Co-polycarbonate copolymer from 2,2-bis(4-hydroxy-3-tertiary butyl phenyl)propane and optical disk | Tatsuya Kanno, Ikuo Takahashi, Tsuyoshi Habe, Tsuyoshi Sei | 1989-05-16 |
| 4797647 | Inductor and a manufacturing method therefor | Akira Okubo | 1989-01-10 |