Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4734482 | Polyimide from ether diamine having the indane structure and high-temperature adhesive of polyimide | Shoji Tamai, Yoshiho Sonobe, Masahiro Ohta, Hideaki Oikawa, Akihiro Yamaguchi | 1988-03-29 |
| 4618714 | Process for preparation of 3,3'- or 3,4'-diaminobenzophenones | Keizaburo Yamaguchi, Kenichi Sugimoto, Yoshimitsu Tanabe, Akihiro Yamaguchi | 1986-10-21 |
| 4556738 | Process for preparation of 3,3'- or 3,4'-diamino benzophenone | Akihiro Yamaguchi | 1985-12-03 |
| 4540818 | Process for preparation of 3,3'- or 3,4'-diaminodiphenylmethane | Keizaburo Yamaguchi, Kenichi Sugimoto, Yoshimitsu Tanabe, Akihiro Yamaguchi | 1985-09-10 |
| 4400492 | Color-developer for pressure-sensitive recording sheets | Makoto Asano, Yoshimitu Tanabe, Hisamichi Murakami | 1983-08-23 |
| 4271059 | Color-developing composition for pressure-sensitive recording sheet material and process for the preparation thereof containing phenolic resin and hindered phenol | Makoto Asano, Kenichi Sugimoto, 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, Kenichi Sugimoto, Tadashi Kobayashi | 1980-11-25 |