Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8419191 | Projection optical system, projector and image reading device | Osamu Nagase | 2013-04-16 |
| 5616806 | Process for preparing high-purity aniline | Teruyuki Nagata, Katsuji Watanabe, Akihiro Tamaki, Takashi Kobayashi | 1997-04-01 |
| 5591886 | Process for the crystallizing L-.alpha.-aspartyl-L-phenylalanine methyl ester from the solution | Hiroshi Ichiki, Ryoichi Taneda, Hiroyuki Itoh | 1997-01-07 |
| 5302187 | Concentration process of gaseous chlorine | Hiroyuki Itoh, Shinji Takenaka, Yukihiro Yoshikawa, Isao Kikuchi, Teruo Hirayama | 1994-04-12 |
| 5296017 | Method and apparatus for concentrating chlorine gas | Masaaki Ura, Hiroyuki Itoh, Satoshi Tsuruda | 1994-03-22 |
| 5283365 | Process for preparing high-purity aniline | Teruyuki Nagata, Katsuji Watanabe, Akihiro Tamaki, Takashi Kobayashi | 1994-02-01 |
| 5254323 | Industrial process for the separation and recovery of chlorine | Hiroyuki Itoh, Isao Kikuchi, Shinji Takenaka, Masanobu Ajioka, Mitsuo Kudoh | 1993-10-19 |
| 5206430 | Method for obtaining high-purity cinnamic acid | Hiroyuki Itoh, Ryoichi Taneda, Usaji Takaki | 1993-04-27 |
| 5112593 | Production process of chlorine | Hiroyuki Itoh, Isao Kikuchi, Shinji Takenaka, Masanobu Ajioka | 1992-05-12 |
| 5104491 | Method for purifying pentachloronitrobenzene by solid base treatment | Mitsumasa Umemoto, Ryuichi Mita, Hiroshi Maeda | 1992-04-14 |
| 5057615 | Process for purifying tryptophan | Hiroyuki Itoh, Ryoichi Taneda, Tsugio Watanabe | 1991-10-15 |
| 5000006 | Industrial process for the separation and recovery of chlorine | Hiroyuki Itoh, Isao Kikuchi, Shinji Takenaka, Masanobu Ajioka, Mitsuo Kudoh | 1991-03-19 |
| 4803065 | Production process of chlorine | Hiroyuki Itoh, Masanobu Ajioka, Shinji Takenaka, Masafumi Kataita | 1989-02-07 |
| 4774070 | Production process of chlorine | Hiroyuki Itoh, Masanobu Ajioka, Shinji Takenaka, Masafumi Kataita | 1988-09-27 |