Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5668069 | Cutting tool composed of silicon nitride | Masahiro Sato, Yukiyasu Aoyama, Shoji Kohsaka | 1997-09-16 |
| 5520716 | Al.sub.2 O.sub.3 -TiC sintered product and substrate for magnetic heads | Hiroki Tokunaga, Shinichiro Masuyama | 1996-05-28 |
| 5246893 | Ceramic sintered body and process for preparation thereof | Hiroki Tokunaga | 1993-09-21 |