Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824769 | High contrast photoresist developer | Robert A. Owens | 1989-04-25 |
| 4822722 | Process of using high contrast photoresist developer with enhanced sensitivity to form positive resist image | Robert A. Owens, Susan A. Ferguson, Roland L. Chin, Valentine T Zuba | 1989-04-18 |