Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820778 | Random copolymer containing hexagonal imide units, a process for producing the same, and an optical disc substrate made of the random copolymer | Ikuji Ohtani, Akihiro Wada, Rin-ichi Kakuta | 1989-04-11 |
| 4814551 | Anticorrosive insulator | Shigeo Mori | 1989-03-21 |