Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845061 | Silicon nitride-alumina composite ceramics and producing method thereof | Kazuhiro Inoguchi, Novuei Ito, Tetsuo Toyama | 1989-07-04 |
| 4814581 | Electrically insulating ceramic sintered body | Tetsuo Toyama, Nobuei Ito, Kazuhiro Inoguchi | 1989-03-21 |