Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4976529 | Soldering material for spectacle frame and spectacle frame in which said soldering material is used | Toshiyuki Okuda, Kenji Okamura, Mizuo Yoshida | 1990-12-11 |
| 4953966 | Spectacle frame | Toshiyuki Okuda, Kenji Okamura, Mizuo Yoshida | 1990-09-04 |