Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5500454 | Denture base separating material | Jinichi Obana, Shigeru Hanatani, Junichi Okada, Ryoji Nakazato | 1996-03-19 |
| 5436283 | Denture base lining material | Junichi Okada | 1995-07-25 |