Issued Patents 2003
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6667120 | Magnetic recording medium, non-magnetic acicular composite particles and process for producing the particles | Kazuyuki Hayashi, Keisuke Iwasaki | 2003-12-23 |
| 6666914 | Black colorant for ink-jet printing ink, ink-jet printing ink, and aqueous pigment dispersion containing the black colorant | Kazuyuki Hayashi, Keisuke Iwasaki | 2003-12-23 |
| 6638675 | Black magnetic toner | Kazuyuki Hayashi, Yasuyuki Tanaka, Seiji Ishitani | 2003-10-28 |
| 6638618 | Black composite iron oxide pigment, and paint and resin composition using the same | Kazuyuki Hayashi, Yusuke Shimohata, Mineko Ohsugi | 2003-10-28 |
| 6623557 | Colorant for ink-jet printing ink, ink-jet printing ink, aqueous pigment dispersion containing the colorant, and organic and inorganic composite particles | Kazuyuki Hayashi, Keisuke Iwasaki | 2003-09-23 |
| 6596071 | Organic and inorganic composite pigments, and paint and resin composition using the same | Kazuyuki Hayashi, Keisuke Iwasaki, Mineko Ohsugi, Yusuke Shimohata | 2003-07-22 |
| 6569530 | Magnetic recording medium and magnetic composite particles or magnetic recording medium | Kazuyuki Hayashi, Keisuke Iwasaki, Mamoru Kamigaki | 2003-05-27 |
| 6562532 | Black magnetic toner and black magnetic composite particles therefor | Kazuyuki Hayashi, Yasuyuki Tanaka, Seiji Ishitani | 2003-05-13 |
| 6544647 | Non-magnetic composite particles, process for producing the same and magnetic recording medium using the same | Kazuyuki Hayashi, Keisuke Iwasaki, Mineko Ohsugi | 2003-04-08 |
| 6531211 | Black plate-shaped ferrite composite particles with magnet oplumbite structure and magnetic recording medium using the same | Kazuyuki Hayashi, Mamoru Kamigaki, Yasuyuki Tanaka, Keisuke Iwasaki | 2003-03-11 |
| 6511733 | Magnetic recording medium containing specific non-magnetic composite particles of coated hematite particles | Kazuyuki Hayashi, Mamoru Kamigaki | 2003-01-28 |