Issued Patents All Time
Showing 25 most recent of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12249350 | Methods for improving track density in dual-reel removable tape devices and fixed tape devices | Keiichi Okada, Akira Sakagami | 2025-03-11 |
| 12106772 | Methods for increasing storage capacity and improving performance in dual-reel removable tape devices and fixed tape devices | Keiichi Okada, Akira Sakagami | 2024-10-01 |
| 11990154 | Seek time to the beginning position of data on tape media | Akira Sakagami, Keiichi Okada | 2024-05-21 |
| 11049518 | Data storage device defining track trajectory to reduce AC track squeeze | Hiroshi Ide, Masaomi Ikeda, Naoto Ito | 2021-06-29 |
| 10699745 | Data storage device defining track trajectory to reduce AC track squeeze | Hiroshi Ide, Masaomi Ikeda, Naoto Ito | 2020-06-30 |
| 10607645 | Data storage device generating PES RRO and data sector squeeze RRO for a plurality of zones | Hiroshi Ide | 2020-03-31 |
| 8049986 | Control method for magnetic disk device, magnetic disk device, and magnetic disk | Kenya Ito | 2011-11-01 |
| 7839590 | Method of servo writing for magnetic recording system, magnetic recording system | Yasutaka Nishida, Hideki Sawaguchi, Hisashi Takano | 2010-11-23 |
| 7724490 | Magnetic disk degaussing device and degaussing method | Hitoshi Tamura, Hiroki Mori, Mitsuru Hamaguchi, Kunihiko Mine | 2010-05-25 |
| 7545595 | Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle | Atsushi Nakamura, Yasutaka Nishida, Masafumi Mochizuki, Hideki Sawaguchi | 2009-06-09 |
| 7525765 | Thermal assist head slider | Masayuki Kurita, Hidekazu Kohira, Mikio Tokuyama | 2009-04-28 |
| 7518814 | Magnetic head tester and method of manufacturing magnetic disk drive | Hiroshi Umezaki, Norifumi Miyamoto, Kazuhiko Washizu, Kenji Itoh | 2009-04-14 |
| 7486485 | Perpendicular hard disk drive resistive against external magnetic field | Yoshihisa Kamo, Hideaki Maeda, Yukiya Shimizu, Ikuya Tagawa, Tetsuo Yuki | 2009-02-03 |
| 7474493 | Alternative DC-burst servo pattern for perpendicular recording | Hideaki Maeda, Kazuhisa Shishida, Yasutaka Nishida | 2009-01-06 |
| 7443625 | Magnetic disk drive | Atsushi Nakamura, Yasutaka Nishida, Hisashi Takano, Yohji Maruyama, Hiroshi Ide +2 more | 2008-10-28 |
| 7436611 | Method of servo writing for magnetic recording system, magnetic recording system | Yasutaka Nishida, Hideki Sawaguchi, Hisashi Takano | 2008-10-14 |
| 7365933 | Servo information recording method, magnetic recording media, and magnetic disk apparatus | Hideaki Maeda, Kazuaki Usui, Kazuhisa Shishida, Takashi Konishi | 2008-04-29 |
| 7289284 | Stray field detector, magnetic disk drive, and method of head escaping | Reiko Arai, Atsushi Kikugawa, Hideaki Maeda, Liping Shen, Mikio Suzuki | 2007-10-30 |
| 7221530 | Magnetic head with high reliability of the data protection, magnetic disk apparatus including the magnetic head and the method of recording information on the magnetic disk apparatus without miserasing the previously recorded data | Futoshi Tomiyama, Miki Hara, Fumiko Akagi, Yasutaka Nishida | 2007-05-22 |
| 7184236 | Magnetic hard disk drive | Kyo Akagi, Hisashi Takano, Takayuki Ichihara | 2007-02-27 |
| 7092181 | Magnetic recording apparatus | Yasutaka Nishida, Hideki Sawaguchi | 2006-08-15 |
| 7075743 | Method of servo writing for magnetic recording system, magnetic recording system | Yasutaka Nishida, Hideki Sawaguchi, Hisashi Takano | 2006-07-11 |
| 7068462 | Magnetic recording apparatus | Yasutaka Nishida, Hideki Sawaguchi | 2006-06-27 |
| 7057838 | Magnetic disk device having a write head to write by shifting in a radial direction | Atsushi Nakamura, Yasutaka Nishida, Hisashi Takano, Yohji Maruyama, Hiroshi Ide +2 more | 2006-06-06 |
| 7031086 | Magnetic recording apparatus, magnetic recording medium and magnetic recording method | Yasutaka Nishida | 2006-04-18 |