Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7001937 | Process for producing colored resin composition and utilization thereof | Masayasu Kawamura, Masashi Koide | 2006-02-21 |
| 6989055 | Monoazo lake pigment composition and gravure ink using the same | Kenji Kitamura, Shigeki Kato, Shoko Goto, Motoi Shitaka, Osamu Shiromaru | 2006-01-24 |
| 6303762 | Method of producing disazo pigment | Hideto Noguchi, Kenji Kitamura, Masami Shirao | 2001-10-16 |
| 5817817 | Process for the production of 2,5-di(arylamino)-3,6-dihydroterephthalic acid dialkyl ester, and process for the production of quinacridone from said ester as intermediate | Shigeki Kato, Yoshimi Kikuchi | 1998-10-06 |
| 5808154 | Process for the production of an aromatic hydrazo compound | — | 1998-09-15 |
| 5659036 | Process for the production of 2,5-di(arylamino)-3,6-dihydroterephthalic acid dialkyl ester, and process for the production of quinacridone from said ester as intermediate | Shigeki Kato, Yoshimi Kikuchi | 1997-08-19 |
| 5622555 | Process for the production of dis-azo pigment | Yoshio Muramatsu, Ataru Chiba | 1997-04-22 |
| 5610306 | Process for the production of 6,13-dihydroquinacridones and apparatus for use for the production | Shigeki Kato, Shinichi Azuma, Mikio Hayashi, Masatoshi Momose | 1997-03-11 |
| 5472490 | Pigment composition, printing ink and coating composition | Katsuhiko Sawamura, Shigeki Kato, Mikio Hayashi | 1995-12-05 |
| 5400199 | Floating magnetic head with variable chamfered surface | Chitatsu Sano, Tatsuya Shimizu | 1995-03-21 |
| 5318626 | Process for converting 2,9-dimethylquinacridone compound into pigment | Shigeki Kato | 1994-06-07 |
| 5136444 | Floating type magnetic head having a magnetic gap for recording tracks at the outer periphery of a magnetic disk | Chitatsu Sano | 1992-08-04 |