Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4514532 | Modified phenol-formaldehyde resin and the production thereof | Oscar Hsien-Hsiang Hsu | 1985-04-30 |
| 4433126 | Modified phenol-formaldehyde resin and the production thereof | Oscar Hsien-Hsiang Hsu | 1984-02-21 |