Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863829 | Positive type high gamma-value photoresist composition with novolak resin possessing | Makoto Hanabata, Seimei Yasui, Osamu Hiroaki, Naoyoshi Jinno | 1989-09-05 |
| 4812551 | Novolak resin for positive photoresist | Fumio Oi, Haruyoshi Osaki, Yukikazu Uemura, Takao Ninomiya, Yasunori Uetani +1 more | 1989-03-14 |