Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6040111 | Aromatic hydroxycarboxylic acid resins and their use | Akio Karasawa, Akihiro Yamaguchi, Keizaburo Yamaguchi | 2000-03-21 |
| 5798422 | Aromatic hydroxycarboxylic acid resins and their use | Akio Karasawa, Akihiro Yamaguchi, Keizaburo Yamaguchi | 1998-08-25 |
| 5710334 | Aromatic dinitro and diamino intermediates | Mitsunori Matsuo, Keizaburo Yamaguchi, Akihiro Yamaguchi | 1998-01-20 |
| 5480965 | Readily soluble, amorphous polyimide, and preparation process of same | Wataru Yamashita, Yuichi Okawa, Hideaki Oikawa, Tadashi Asanuma, Mitsunori Matsuo +3 more | 1996-01-02 |
| 5354890 | Aromatic diamine intermediates useful in the preparation of polyimides | Shoji Tamai, Wataru Yamashita, Yuichi Okawa, Keizaburo Yamaguchi, Akihiro Yamaguchi | 1994-10-11 |
| 5322962 | Aromatic diamine intermediates useful in the preparation of polyimide | Shoji Tamai, Keizaburo Yamaguchi, Saburo Kawashima, Hideaki Oikawa, Toshiyuki Kataoka +1 more | 1994-06-21 |
| 5260388 | Polyimide and process for the preparation thereof | Shoji Tamai, Wataru Yamashita, Yuichi Okawa, Keizaburo Yamaguchi, Akihiro Yamaguchi | 1993-11-09 |
| 5231160 | Aromatic diamine compound, preparation process of same and polyimide prepared from same | Shoji Tamai, Keizaburo Yamaguchi, Saburo Kawashima, Hideaki Oikawa, Toshiyuki Kataoka +1 more | 1993-07-27 |