Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818808 | Process for producing polyesters using a niobium compound as a catalyst | Yoshimichi Ozawa, Nobuo Izawa | 1989-04-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818808 | Process for producing polyesters using a niobium compound as a catalyst | Yoshimichi Ozawa, Nobuo Izawa | 1989-04-04 |