Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5675201 | Composite bearing structure | Osamu Komura, Tetsuya Katayama, Akira Yamakawa, Kenji Matsunuma, Norio Yasuoka +1 more | 1997-10-07 |
| 5622905 | Silicon nitride based sintered body | Takashi Matsuura, Akira Yamakawa | 1997-04-22 |
| 5603788 | Method of manufacturing a ceramics-type vacuum vessel | Tetsuya Abe, Yoshio Murakami, Hisao Takeuchi, Akira Yamakawa | 1997-02-18 |