Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831110 | Co-polycarbonate copolymer from 2,2-bis(4-hydroxy-3-tertiary butyl phenyl)propane and optical disk | Ikuo Takahashi, Kenichi Sasaki, Tsuyoshi Habe, Tsuyoshi Sei | 1989-05-16 |