Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6730769 | Novolak resin, production process thereof and positive photoresist composition using the novolak resin | Akira Katano, Mitsuo Hagihara, Ken Miyagi | 2004-05-04 |
| 6680155 | Positive photoresist composition | Mitsuo Hagihara, Kenji Maruyama | 2004-01-20 |