Issued Patents All Time
Showing 1–25 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10000835 | Cooling method and cooling device for Al alloy manufactured casting | Tomohide Kubota, Naoaki Yamamoto, Yasuyuki Misawa | 2018-06-19 |
| 7365927 | Eccentricity correction data recording method and recording medium having eccentricity correction data | Kohei Takamatsu, Yoshiyuki Kagami | 2008-04-29 |
| 7164261 | Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences | Ryuki Kubohara, Tatsuhiko Kosugi, Takeyori Hara, Yoshiyuki Kagami | 2007-01-16 |
| 7002769 | Head control method and recording apparatus | Yoshiyuki Kagami, Isamu Tomita | 2006-02-21 |
| 6774615 | Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences | Susumu Yoshida, Ryuki Kubohara, Tatsuhiko Kosugi, Takeyori Hara, Yoshiyuki Kagami | 2004-08-10 |
| 6191902 | Magnetic disk apparatus and magnetic disk medium | Yoshihiro Hashimura | 2001-02-20 |
| 6128153 | Head position control for a disk drive which performs recording about the rotational center even if the recorded servo information is eccentric | Susumu Hasegawa, Yukihiro Uematsu, Tomoyoshi Yamada, Takahisa Ueno, Nobuyuki Suzuki +1 more | 2000-10-03 |
| 6048648 | Mask including optical shield layer having variable light transmittance | Masashi Fujimoto | 2000-04-11 |
| 6009052 | Method and circuit for controlling head position | — | 1999-12-28 |
| 5995318 | Head positioning control system for disk drives each formed by assembling disks after servo control information is written externally on respective disks and disk drive | Susumu Hasegawa, Yukihiro Uematsu, Keiji Aruga, Kazuhiko Takaishi | 1999-11-30 |
| 5903404 | High density disk unit and disk medium | Hiroshi Tsurumi | 1999-05-11 |
| 5844744 | Head positioning control apparatus of disk drive and method of controlling the same apparatus | Nobuyuki Suzuki, Toshio Negoro | 1998-12-01 |
| 5831787 | Head position demodulating method | Susumu Yoshida | 1998-11-03 |
| 5786113 | Photo-mask used in aligner for exactly transferring main pattern assisted by semi-transparent auxiliary pattern and process of fabrication thereof | Kunihiko Kasama | 1998-07-28 |
| 5724204 | Apparatus and method of reproducing synchronization signal in disc storage system | Tohru Shinohara | 1998-03-03 |
| 5709970 | Mask having a pattern for detecting illuminance nonuniformity | — | 1998-01-20 |
| 5682272 | Disk drive and method for retrying a read operation upon detecting a read error | Yuichi Taroda | 1997-10-28 |
| 5625505 | Method of and apparatus for regenerating partial-response record signal | Hideki Ohmori | 1997-04-29 |
| 5566296 | Method and apparatus for eliminating noises with a read operation of magnetic disk unit | Hideki Ohmori | 1996-10-15 |
| 5523900 | Head position detecting method and apparatus | Tatsuhiko Kosugi, Toru Shinohara | 1996-06-04 |
| 5438032 | Crystal modifications of 2-m-toluidino-3-methyl-6-di-n-butylaminofluoran, process for preparing thereof, and recording materials containing said crystal modifications | Shigeo Fujita, Mansuke Matsumoto, Yojiro Kumagae, Sayuri Wada | 1995-08-01 |
| 5432659 | Magnetic disk unit having a plurality of magnetic heads | Tatsuhiko Kosugi | 1995-07-11 |
| 5342967 | Crystal modifications of 2-M-toluidino-3-methyl-6-di-N-butylaminofluoran, process for preparing thereof, and recording materials containing said crystal modifications | Shigeo Fujita, Mansuke Matsumoto, Yojiro Kumagae, Sayuri Wada | 1994-08-30 |
| 5311379 | Method and system for positioning head on target cylinder of disk | Tohru Shinohara | 1994-05-10 |
| 5231550 | Track access control system preventing unintentional delay in movement of head in non-adjusted disc device | — | 1993-07-27 |