Yamaguchi; Keizaburo
Patent Applications and Registrations
Patent applications and USPTO patent grants for Yamaguchi; Keizaburo.The latest application filed is for "aromatic hydroxycarboxylic acid resins and their use".
- Yamaguchi; Keizaburo - Chiba-ken JP
- Yamaguchi; Keizaburo - Chiba JP
- Yamaguchi; Keizaburo - Kanagawa JP
- Yamaguchi; Keizaburo - Kawasaki JP
| Patent | Date |
|---|---|
| Aromatic hydroxycarboxylic acid resins and their use Grant 6,040,111 - Karasawa , et al. March 21, 2 | 2000-03-21 |
| Polyimide intermediates Grant 5,631,377 - Matsuo , et al. May 20, 1 | 1997-05-20 |
| Polyimide resin composition Grant 5,494,996 - Tamai , et al. February 27, 1 | 1996-02-27 |
| Polyimide and process for the preparation thereof Grant 5,260,388 - Tamai , et al. November 9, 1 | 1993-11-09 |
| Salicylic acid copolymers and their metal salts, production process thereof, color-developing agents comprising metal salts of the copolymers, and color-developing sheets employing the agents Grant 5,023,366 - Yamaguchi , et al. June 11, 1 | 1991-06-11 |
| Process for producing fluorobenzophenone derivatives Grant 4,453,009 - Yamaguchi , et al. June 5, 1 | 1984-06-05 |
| Color-developing sheet for pressure-sensitive recording sheets Grant 4,260,179 - Yamaguchi , et al. April 7, 1 | 1981-04-07 |
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