Issued Patents All Time
Showing 26–50 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6057021 | Magnetic recording media and magnetic recording system using the same | Akira Ishikawa, Yuzuru Hosoe, Masatoshi Takeshita, Yotsuo Yahisa, Tomoo Yamamoto +6 more | 2000-05-02 |
| 5851643 | Magnetic recording media and magnetic recording read-back system which uses such media | Yukio Honda, Nobuyuki Inaba, Mikio Suzuki, Masaaki Futamoto, Hiroyuki Awano +1 more | 1998-12-22 |
| 5835305 | Magnetic disk apparatus employing liquid bearing type or physical contact type magnetic head slider | Tetsuya Hamaguchi, Yukio Kato, Masaaki Matsumoto, Hiromitsu Tokisue, Takayuki Nakakawaji +1 more | 1998-11-10 |
| 5815343 | Magnetic recording medium, process for producing the same and magnetic recording system | Akira Ishikawa, Yuzuru Hosoe, Yotsuo Yahisa, Tomoo Yamamoto, Masukazu Igarashi +3 more | 1998-09-29 |
| 5786952 | Magnetic digital storage method and system wherein magnetic transition points in adjacent recorded tracks are out of phase with each other | Masuo Umemoto, Reijiro Tsuchiya, Kyo Akagi, Takehiko Hamaguchi, Takashi Kawabe +2 more | 1998-07-28 |
| 5759681 | Magnetic recording medium and magnetic recording system using the same | Yuzuru Hosoe, Kazuetsu Yoshida, Nobuyuki Inaba, Tomoo Yamamoto, Akira Ishikawa +2 more | 1998-06-02 |
| 5750230 | Magnetic recording media and magnetic recording system using the same | Akira Ishikawa, Yuzuru Hosoe, Masatoshi Takeshita, Yotsuo Yahisa, Tomoo Yamamoto +6 more | 1998-05-12 |
| 5723198 | Multi-layered magnetic recording medium and magnetic recording system employing the same | Yuzuru Hosoe, Akira Ishikawa, Futoshi Tomiyama, Kazuetsu Yoshida, Tomoo Yamamoto +7 more | 1998-03-03 |
| 5671107 | Large capacity magnetic disc apparatus with a particular relationship between pole thickness, saturated flux density, and recording wavelength | Katsuya Mitsuoka, Hiroshi Fukui, Makoto Aihara, Masanori Tanabe, Moriaki Fuyama +8 more | 1997-09-23 |
| 5665478 | Magnetic recording media for longitudinal recording | Hiroyuki Suzuki, Sadao Hishiyama, Tomoyuki Ohno, Yotsuo Yahisa, Yoshibumi Matsuda +5 more | 1997-09-09 |
| 5618639 | Magnetic recording medium and magnetic recording apparatus | Tomoyuki Ohno, Yotsuo Yahisa, Akira Osaki, Yuichi Ootani | 1997-04-08 |
| 5605733 | Magnetic recording medium, method for its production, and system for its use | Akira Ishikawa, Sadao Hishiyama, Tomoo Yamamoto, Tomoyuki Ohno, Yotsuo Yahisa +1 more | 1997-02-25 |
| 5236791 | Magnetic recording medium and magnetic storage | Yotsuo Yahisa, Sadao Hishiyama, Tomoyuki Ohno, Shinichiro Saitoh | 1993-08-17 |
| 5147732 | Longitudinal magnetic recording media and magnetic memory units | Takeo Yamashita, Sadao Hishiyama, Noriyuki Kumasaka, Yoshibumi Matsuda, Hiroyuki Suzuki +4 more | 1992-09-15 |
| 5143794 | Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus | Hiroyuki Suzuki, Sadao Hishiyama, Tomoyuki Ohno, Yotsuo Yahisa, Yoshibumi Matsuda +5 more | 1992-09-01 |
| 5083226 | Magnetic disk drive | Kazuo Shiiki, Norio Ohta, Toshiaki Tsuyoshi, Hisashi Takano, Fumio Kugiya | 1992-01-21 |
| 4950548 | Magnetic recording medium and method of producing same | Kenji Furusawa, Katsuo Abe, Hiroyuki Kataoka, Tokuho Takagaki, Norikazu Tsumita | 1990-08-21 |
| 4939045 | Magnetic recording medium | Kazuetsu Yoshida, Makoto Saito, Norikazu Tsumita, Takeo Yamashita, Hiroyuki Suzuki +8 more | 1990-07-03 |
| 4883711 | Magnetic recording medium | Sadao Hishiyama, Hiroyuki Suzuki, Tomoyuki Ohno, Yoshibumi Matsuda, Kazumasa Takagi +4 more | 1989-11-28 |
| 4842917 | Magnetic recording medium and process for producing the same | Tomoyuki Ohno, Sadao Hishiyama, Hiroyuki Suzuki, Takaaki Shirakura, Shinya Matsuoka +5 more | 1989-06-27 |
| 4833020 | Magnetic recording medium | Sadao Hishiyama, Hiroyuki Suzuki, Tomoyuki Ohno, Yoshibumi Matsuda, Kazumasa Takagi +4 more | 1989-05-23 |
| 4814921 | Multilayered magnetic films and thin-film magnetic heads using the same as a pole | Yoshihiro Hamakawa, Kazuo Shiiki, Isamu Yuitoo, Hitoshi Numasaka, Noriyuki Kumasaka +2 more | 1989-03-21 |
| 4792497 | Magnetic recording media for longitudinal recording | Hiroyuki Suzuki, Sadao Hishiyama, Tomoyuki Ohno, Kazuetsu Yoshida, Shyuichi Kojima +4 more | 1988-12-20 |
| 4786553 | Magnetic recording medium | Sadao Hishiyama, Hiroyuki Suzuki, Norikazu Tsumita, Tsuneo Suganuma, Yoshio Gobara +3 more | 1988-11-22 |
| 4762755 | Ferromagnetic material and a magnetic head using the same material | Kazuo Shiiki, Noriyuki Kumasaka, Hitoshi Nakamura, Yoshihiro Hamakawa, Noritoshi Saito +3 more | 1988-08-09 |