Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851146 | Phosphonic acid derivative based agents for cleaning and dissolving tartar of removable oral prostheses | Toshio Hosoi | 1989-07-25 |
| 4825115 | Ultrasonic transducer and method for fabricating thereof | Kenji Kawabe, Fumihiro Namiki, Atsuo Iida, Takaki Shimura | 1989-04-25 |
| 4825201 | Display device with panels compared to form correction signals | Makoto Ota, Toshiharu Imamura | 1989-04-25 |
| 4799887 | Glass ceramic dental crown and method of manufacturing the same | Yasuharu Hakamatsuka | 1989-01-24 |