Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7611631 | Indium adsorbent and indium fractioning method | Akifusai Ohnishi, Nobuaki Fujiwara, Toyokazu Matsunami, Hiroshi Tsubota, Toshiaki Muratani +3 more | 2009-11-03 |
| 5525725 | Process for producing a high purity caprolactam | Yasuhiko Higashio, Hiroshi Kajikuri, Keisuke Sugita, Masanobu Matsubara | 1996-06-11 |
| 5459261 | Process for producing a high purity caprolactam | Yasuhiko Higashio, Hiroshi Kajikuri, Keisuke Sugita, Masanobu Matsubara | 1995-10-17 |
| 5362870 | Process for producing a high purity caprolactam | Yasuhiko Higashio, Hiroshi Kajikuri, Keisuke Sugita, Masanobu Matsubara | 1994-11-08 |