Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5356842 | Composite ceramic powder and production process thereof | Akira Yamakawa | 1994-10-18 |
| 5293509 | Sintered body of aluminum nitride | Akira Yamakawa, Masaya Miyake, Hitoyuki Sakanoue | 1994-03-08 |