Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5879078 | Device for producing ceramic sintered body | Yasushi Tsuzuki, Akira Yamakawa | 1999-03-09 |
| 5424256 | Silicon nitride sintered body | Masashi Yoshimura, Takehisa Yamamoto, Shinichi Yamagata, Akira Yamakawa | 1995-06-13 |
| 5384292 | Silicon nitride composite sintered body and process for producing the same | Osamu Komura, Akira Yamakawa, Masaya Miyake | 1995-01-24 |
| 5369065 | Silicon nitride sintered body and process for producing the same | Masashi Yoshimura, Takehisa Yamamoto, Akira Yamakawa | 1994-11-29 |
| 5352641 | Silicon nitride composite sintered body and process for producing same | Akira Yamakawa | 1994-10-04 |