Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5187311 | Methylthiophenol derivatives and p-methylthiophenyl chloroformates and processes for producing these derivatives | Mutsuhiko Takeda, Isao Hagiwara, Fumiya Zaima | 1993-02-16 |
| 5149857 | Process for production of sulfonium compounds | Mutsuhiko Takeda, Isao Hagiwara, Fumiya Zaima | 1992-09-22 |
| 5075476 | Process for production of sulfonium compounds and novel methylthiphenol derivatives | Mutsuhiko Takeda, Isao Hagiwara, Fumiya Zaima | 1991-12-24 |
| 4751326 | Process for producing benzophenone-azine | Takanari Nawata, Toshiaki Kohzaki, Osamu Aoki, Norio Takeda, Masafumi Shimpo | 1988-06-14 |
| 4727190 | Process for preparing benzophenone-azines | Takanari Nawata, Toshiaki Kohzaki, Osamu Aoki, Norio Takeda, Yoshiyuki Aoki +1 more | 1988-02-23 |
| 4628119 | Process for preparing hydrazine hydrohalogenide | Takanari Nawata, Osamu Aoki | 1986-12-09 |
| 4347383 | Process for producing benzophenone-azines | Tomiya Isshiki, Tetsuo Tomita, Toshiaki Kohzaki, Osamu Aoki, Norio Takeda +1 more | 1982-08-31 |