Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9122182 | Charge control agent and toner for electrostatic image development containing same | — | 2015-09-01 |
| 8076465 | Method for manufacturing charge control agent | Masashi Yasumatsu, Osamu Yamate, Kaori Sato, Jun Hikata | 2011-12-13 |
| 7479360 | Electric charge controlling agent, toner for developing electrostatic charge image containing the same, and method for forming image using the toner | Masashi Yasumatsu, Osamu Yamate, Kaori Sato, Jun Hikata, Heihachi Yushina | 2009-01-20 |
| 7094513 | Charge control agent and toner for electrostatic image development | Masashi Yasumatsu, Osamu Yamate, Kaori Sato, Jun Hikata, Heihachi Yushina | 2006-08-22 |
| 6242648 | Process for preparing triarylamine dimer | Yasuhiro Yamasaki | 2001-06-05 |
| 6150518 | Process for preparing .chi.-form metal free phthalocyanine | Yasuhiro Yamasaki | 2000-11-21 |
| 6106985 | Layered-form electrophotographic photoreceptor | Yasuhiro Yamasaki | 2000-08-22 |
| 6093514 | (.mu.)-oxo-aluminum/gallium phthalocyanine dimer | Yasuhiro Yamasaki, Kenji Takaki | 2000-07-25 |
| 5981745 | .mu.-oxo-gallium phthalocyanine dimer having novel polymorph and electrophotographic photoreceptor prepared by using the same | Yasuhiro Yamasaki, Kenji Takaki | 1999-11-09 |
| 5910384 | .mu. -oxo-galliuim phthalocyanine dimer having novel polymorph and electrophotographic photoreceptor prepared by using the same | Yasuhiro Yamasaki, Kenji Takaki | 1999-06-08 |
| 5725984 | Omega-oxo-aluminum phthalocyanine dimer having novel polymorph and electrophotographic photoreceptor prepared by using the same | Yasuhiro Yamasaki | 1998-03-10 |