Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862029 | Actuator | Kiyoshi Kasai, Naomichi Sakai, Tomoyuki Oikawa, Kenji Uchino, Hiroshi Asakura +2 more | 1989-08-29 |
| 4774041 | High-strength zirconia type sintered body and process for preparation thereof | Koji Tsukuma, Kuniyoshi Ueda | 1988-09-27 |
| 4770830 | Process for preparation of high .alpha.-type silicon nitride powder | Toshihiko Arakawa, Kuniyoshi Ueda, Naomichi Sakai | 1988-09-13 |
| 4716028 | Process for preparation of high-type silicon nitride powder | Kiyoshi Kasai, Toshihiko Arakawa | 1987-12-29 |
| 4690910 | Sintered product of zirconia and method of producing the same | Koji Tsukuma | 1987-09-01 |
| 4666467 | High-strength metal working tool made of a zirconia-type sintered material | Yoshihiro Matsumoto, Yoshitaka Kubota, Koji Tsukuma | 1987-05-19 |
| 4612297 | Process for preparation of silicon nitride powder of good sintering property | Kiyoshi Kasai, Shinji Nagata, Toshihiko Arakawa | 1986-09-16 |
| 4587225 | High-strength zirconia type sintered body | Koji Tsukuma, Kuniyoshi Ueda | 1986-05-06 |
| 4387079 | Method of manufacturing high-purity silicon nitride powder | Kiyoshi Kasai, Kohji Tsukuma | 1983-06-07 |
| 4346068 | Process for preparing high-purity .alpha.-type silicon nitride | Kiyoshi Kasai, Yoshitaka Kubota | 1982-08-24 |
| 4247529 | Process for producing titanium carbonitride | Tadaaki Mori, Junji Arika | 1981-01-27 |