Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828493 | Denture base | Osamu Kuwabara, Yoshihiko Okuno, Toshiyuki Ohban | 1989-05-09 |
| 4808353 | Process for preparing an artificial biological membrane | Tatsuo Kinoshita, Mineo Watase | 1989-02-28 |