Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5017531 | Silicon nitride ceramic sintered bodies | Noriyuki Ukai, Issei Hayakawa, Tadaaki Matsuhisa | 1991-05-21 |
| 4820665 | Ceramic sintered bodies and a process for manufacturing the same | Noriyuki Ukai, Issei Hayakawa, Tadaaki Matsuhisa | 1989-04-11 |