Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5063257 | Dental glass ionomer cement compositions | Shoji Akahane, Yukiharu Kusayanagi, Shigenobu Kusakai, Kazuo Hirota, Kentaro Tomioka | 1991-11-05 |
| 4900697 | Glass powders for dental glass ionomer cements | Shoji Akahane, Kazuo Hirota, Kentaro Tomioka | 1990-02-13 |
| 4647311 | Gypsum composition for denture investment | Nobukazu Ohi, Koji Ohno | 1987-03-03 |
| 4526619 | Gypsum composition for denture investment | Nobukazu Ohi, Koji Ohno | 1985-07-02 |