Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5275981 | Al.sub.2 O.sub.3 based ceramic | Akio Nishiyama, Takashi Koyama, Yasutaka Aikawa, Yuichiro Terao, Munenori Kato +1 more | 1994-01-04 |
| 5188908 | Al.sub.2 O.sub.3 Based ceramics | Akio Nishiyama, Takashi Koyama, Yasutaka Aikawa, Yuichiro Terao, Munenori Kato +1 more | 1993-02-23 |
| 5130279 | Silicon nitride based sintered material and process of manufacturing same | Takashi Koyama, Yasutaka Aikawa | 1992-07-14 |