Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7129019 | Optical information recording medium | Takeshi Kakuta, Shinji Saito, Toshio Ishida, Takako Ozawa | 2006-10-31 |
| 7041398 | Magnetic recording medium and magnetic recording and reproducing method using the same | — | 2006-05-09 |
| 6936338 | Magnetic recording tape | Noriko Inoue | 2005-08-30 |
| 6835445 | Magnetic recording medium | Takeshi Harasawa | 2004-12-28 |
| 6818277 | Magnetic recording medium and reproduction process using the same | Masatoshi Takahashi | 2004-11-16 |
| 6805942 | Magnetic recording tape | Noriko Inoue | 2004-10-19 |
| 6767612 | Magnetic recording medium | Takeshi Harasawa | 2004-07-27 |
| 6713171 | Magnetic recording medium | Takako Ozawa, Takeshi Harasawa | 2004-03-30 |
| 6703107 | Magnetic tape | Masatoshi Takahashi | 2004-03-09 |
| 6645648 | Magnetic recording medium comprising a backcoat layer having specific protrusions | Satoshi Matsubaguchi, Tetsuji Nishida | 2003-11-11 |
| 6641891 | Magnetic recording medium | Nobuo Yamazaki | 2003-11-04 |
| 6579592 | Magnetic recording tape with controlled Hc and magnetic flux/unit area value and controlled Cl/Fe intensity | Satoshi Matsubaguchi, Masaki Suzuki, Hiroaki Takano, Hiroo Inaba, Kiyomi Ejiri | 2003-06-17 |
| 6316077 | Magnetic recording medium | Masatoshi Takahashi | 2001-11-13 |
| 6291052 | Magnetic recording medium | Masatoshi Takahashi, Hitoshi Noguchi, Junichi Nakamikawa | 2001-09-18 |
| 6037051 | Magnetic tape | Takeshi Kakuta, Hiroaki Araki | 2000-03-14 |
| 5512350 | Magnetic recording medium having a magnetic layer with a specified surface roughness and which contains ferromagnetic powder, binder, and an abrasive | Katsumi Ryoke, Katsuhiko Meguro, Masaki Suzuki, Toshiyuki Kitahara, Masami Sato | 1996-04-30 |
| 5503943 | Magnetic recording medium | Kunihiko Sano, Tadashi Yasunaga | 1996-04-02 |
| 5479311 | Magnetic tape cassette having improved magnetic tape substrate and tape guide for reducing electrostatic charging | Yasutoshi Okuzawa, Tadashi Ishiguro, Takeshi Kakuta, Kazuo Kato | 1995-12-26 |
| 5322733 | Magnetic recording medium | Tadashi Yasunaga | 1994-06-21 |
| 5096774 | Magnetic recording medium containing ferromagnetic particles with specified crystallite sizes and wherein the ratio of chlorine to iron at the surface is within a specified range | Kunihiko Sano, Kiyomi Ejiri, Hiroyuki Tahara | 1992-03-17 |
| 5093191 | Magnetic recording medium containing ferromagnetic particles with specified crystallite sizes and wherein the ratio of chlorine to iron at the surface is within a specified range | Kunihiko Sano, Kiyomi Ejiri, Hiroyuki Tahara | 1992-03-03 |