Issued Patents All Time
Showing 76–81 of 81 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4618714 | Process for preparation of 3,3'- or 3,4'-diaminobenzophenones | Keizaburo Yamaguchi, Yoshimitsu Tanabe, Saburo Kawashima, Akihiro Yamaguchi | 1986-10-21 |
| 4540818 | Process for preparation of 3,3'- or 3,4'-diaminodiphenylmethane | Keizaburo Yamaguchi, Yoshimitsu Tanabe, Saburo Kawashima, Akihiro Yamaguchi | 1985-09-10 |
| 4482742 | Process for preparing of 3,3'-diamino diphenylsulfones | Keizaburo Yamaguchi, Yoshimitsu Tanabe | 1984-11-13 |
| 4453009 | Process for producing fluorobenzophenone derivatives | Akihiro Yamaguchi, Keizaburo Yamaguchi, Yoshimitsu Tanabe | 1984-06-05 |
| 4271059 | Color-developing composition for pressure-sensitive recording sheet material and process for the preparation thereof containing phenolic resin and hindered phenol | Makoto Asano, Saburo Kawashima, Tadashi Kobayashi | 1981-06-02 |
| 4235769 | Color-developing phenolic-aldehyde composition for pressure-sensitive recording sheet material and process for the preparation thereof | Makoto Asano, Saburo Kawashima, Tadashi Kobayashi | 1980-11-25 |