Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845143 | Pattern-forming material | Toshio Ito, Yoshio Yamashita, Takateru Asano, Kenji Kobayashi | 1989-07-04 |
| 4826943 | Negative resist material | Toshio Ito, Yoshio Yamashima | 1989-05-02 |