Issued Patents 2002
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6475687 | Magnetic composite particles for black magnetic toner and black magnetic toner using the same | Kazuyuki Hayashi, Yusuke Shimohata, Keisuke Iwasaki | 2002-11-05 |
| 6458453 | Magnetic recording medium | Kazuyuki Hayashi, Mamoru Kamigaki, Seiji Ishitani | 2002-10-01 |
| 6458452 | Titanium oxide particles, substrate for magnetic recording medium and magnetic recording medium using the same | Kazuyuki Hayashi, Keisuke Iwasaki, Yasuyuki Tanaka | 2002-10-01 |
| 6440561 | Iron oxide hydroxide composite particles, pigment, paint and resin composition | Kazuyuki Hayashi, Mineko Ohsugi | 2002-08-27 |
| 6432377 | Particles for non-magnetic undercoat layer of magnetic recording medium, method thereof and magnetic recording medium | Kazuyuki Hayashi, Keisuke Iwasaki | 2002-08-13 |
| 6432508 | High-density acicular hematite particles, non-magnetic undercoat layer and magnetic recording medium | Kazuyuki Hayashi, Keisuke Iwasaki, Yasuyuki Tanaka | 2002-08-13 |
| 6420030 | Black iron-based composite particles, process for producing the same, paint and rubber or resin composition containing the same | Kazuyuki Hayashi, Yasuyuki Tanaka | 2002-07-16 |
| 6416864 | Black magnetic composite particles for a black magnetic toner | Kazuyuki Hayashi, Yasuyuki Tanaka, Seiji Ishitani | 2002-07-09 |
| 6379855 | Black magnetic toner and black magnetic composite particles therefor | Kazuyuki Hayashi, Yasuyuki Tanaka, Seiji Ishitani | 2002-04-30 |
| 6352776 | Magnetic recording medium, non-magnetic acicular black iron-based composite particles and process for producing the particles | Kazuyuki Hayashi, Keisuke Iwasaki, Yasuyuki Tanaka | 2002-03-05 |
| 6350505 | High-density acicular hematite particles, non-magnetic undercoat layer and magnetic recording medium | Kazuyuki Hayashi, Keisuke Iwasaki, Yasuyuki Tanaka | 2002-02-26 |