Issued Patents All Time
Showing 26–50 of 72 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6767611 | Black magnetic acicular containing composite particles magnetic recording medium | Kazuyuki Hayashi, Hiroko Morii, Mamoru Kamigaki, Yasuyuki Tanaka | 2004-07-27 |
| 6737211 | Color toner | Kazuyuki Hayashi, Hiroko Morii | 2004-05-18 |
| 6723456 | Hematite particles aggregates, non-magnetic undercoatt layer for magnetic recording medium using the same, and magnetic recording medium having the non-magnetic undercoat layer | Kazuyuki Hayashi, Seiji Ishitani, Hiroko Morii | 2004-04-20 |
| 6701331 | Data processing device and method of processing data | Yuji Sawada, Hisashi Saiga, Masafumi Yamanoue, Yoshihiro Kitamura | 2004-03-02 |
| 6667120 | Magnetic recording medium, non-magnetic acicular composite particles and process for producing the particles | Kazuyuki Hayashi, Hiroko Morii | 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, Hiroko Morii | 2003-12-23 |
| 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, Hiroko Morii | 2003-09-23 |
| 6596071 | Organic and inorganic composite pigments, and paint and resin composition using the same | Kazuyuki Hayashi, Mineko Ohsugi, Yusuke Shimohata, Hiroko Morii | 2003-07-22 |
| 6569530 | Magnetic recording medium and magnetic composite particles or magnetic recording medium | Kazuyuki Hayashi, Mamoru Kamigaki, Hiroko Morii | 2003-05-27 |
| 6544647 | Non-magnetic composite particles, process for producing the same and magnetic recording medium using the same | Kazuyuki Hayashi, Hiroko Morii, 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, Hiroko Morii, Mamoru Kamigaki, Yasuyuki Tanaka | 2003-03-11 |
| 6475687 | Magnetic composite particles for black magnetic toner and black magnetic toner using the same | Kazuyuki Hayashi, Yusuke Shimohata, Hiroko Morii | 2002-11-05 |
| 6458452 | Titanium oxide particles, substrate for magnetic recording medium and magnetic recording medium using the same | Kazuyuki Hayashi, Yasuyuki Tanaka, Hiroko Morii | 2002-10-01 |
| 6441811 | Display control device and reproduction display device for electronic books | Yuji Sawada, Yasuhisa Nakamura, Hisashi Saiga, Masafumi Yamanoue, Yoshihiro Kitamura | 2002-08-27 |
| 6432377 | Particles for non-magnetic undercoat layer of magnetic recording medium, method thereof and magnetic recording medium | Kazuyuki Hayashi, Hiroko Morii | 2002-08-13 |
| 6432508 | High-density acicular hematite particles, non-magnetic undercoat layer and magnetic recording medium | Kazuyuki Hayashi, Yasuyuki Tanaka, Hiroko Morii | 2002-08-13 |
| 6352776 | Magnetic recording medium, non-magnetic acicular black iron-based composite particles and process for producing the particles | Kazuyuki Hayashi, Yasuyuki Tanaka, Hiroko Morii | 2002-03-05 |
| 6350505 | High-density acicular hematite particles, non-magnetic undercoat layer and magnetic recording medium | Kazuyuki Hayashi, Yasuyuki Tanaka, Hiroko Morii | 2002-02-26 |
| 6299973 | Acicular hematite particles having a low sodium content and their use in a magnetic recording medium | Kazuyuki Hayashi, Hiroko Morii | 2001-10-09 |
| 6294242 | Magnetic recording medium | Kazuyuki Hayashi, Hiroko Morii, Mamoru Kamigaki, Yasuyuki Tanaka | 2001-09-25 |
| 6287668 | Magnetic recording medium and substrate therefor | Kazuyuki Hayashi, Yasuyuki Tanaka, Hiroko Morii | 2001-09-11 |
| 6248437 | Magnetic recording medium containing non-magnetic hematite particles as an undercoat layer | Kazuyuki Hayashi, Hiroko Morii, Yasuyuki Tanaka | 2001-06-19 |
| 6207253 | Acicular hematite particles and magnetic recording medium | Kazuyuki Hayashi, Yasuyuki Tanaka, Hiroko Morii | 2001-03-27 |
| 6207279 | High-density acicular hematite particles, non-magnetic undercoat layer and magnetic recording medium | Kazuyuki Hayashi, Yasuyuki Tanaka, Hiroko Morii | 2001-03-27 |
| 6159592 | Magnetic recording medium | Kazuyuki Hayashi, Hiroko Morii | 2000-12-12 |