Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |