Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7082496 | Cache control method and apparatus | Akira Yamamoto, Shigeo Homma, Yoshihiro Asaka, Yoshiaki Kuwahara, Masafumi Nozawa +1 more | 2006-07-25 |
| 6961816 | Disk array device with selectable method for generating redundant data | Eiju Katsuragi, Mikito Ogata, Toshihiko Tamiya, Akira Yamamoto, Naoya Takahashi | 2005-11-01 |
| 6604172 | Disk array device with selectable method for generating redundant data | Eiju Katsuragi, Mikito Ogata, Toshihiko Tamiya, Akira Yamamoto, Naoya Takahashi | 2003-08-05 |
| 6473867 | Parity storage unit, in a disk array system, for generating updated parity data from received data records | Akira Yamamoto, Toshihiko Tamiya, Hisashi Takamatsu, Hirofumi Inomata | 2002-10-29 |
| 6463505 | Disk array device with selectable method for generating redundant data | Eiju Katsuragi, Mikito Ogata, Toshihiko Tamiya, Akira Yamamoto, Naoya Takahashi | 2002-10-08 |
| 6374327 | Method of data migration | Hidetoshi Sakaki, Katsunori Nakamura, Takehiro Ishikawa, Toshiaki Hatanaka, Hiroshi Nishijima | 2002-04-16 |
| 6269424 | Disk array device with selectable method for generating redundant data | Eiju Katsuragi, Mikito Ogata, Toshihiko Tamiya, Akira Yamamoto, Naoya Takahashi | 2001-07-31 |
| 6230239 | Method of data migration | Hidetoshi Sakaki, Katsunori Nakamura, Takehiro Ishikawa, Toshiaki Hatanaka, Hiroshi Nishijima | 2001-05-08 |
| 6209107 | Parity storage unit, in a disk array system, for generating updated parity data from received data records | Akira Yamamoto, Toshihiko Tamiya, Hisashi Takamatsu, Hirofumi Inomata | 2001-03-27 |
| 6085286 | Cache control method and apparatus | Akira Yamamoto, Shigeo Homma, Yoshihiro Asaka, Yoshiaki Kuwahara, Masafumi Nozawa +1 more | 2000-07-04 |
| 6032263 | Parity storage unit, in a disk array system, for generating updated parity data from received data records | Akira Yamamoto, Toshihiko Tamiya, Hisashi Takamatsu, Hirofumi Inomata | 2000-02-29 |
| 5826002 | Parity storage unit, in a disk array system for generating updated parity data from received data records | Akira Yamamoto, Toshihiko Tamiya, Hisashi Takamatsu, Hirofumi Inomata | 1998-10-20 |
| 5734812 | Storage unit with parity generation function and storage systems using storage unit with parity generation analyzation | Akira Yamamoto, Toshihiko Tamiya, Hisashi Takamatsu, Hirofumi Inomata | 1998-03-31 |
| 5694576 | Cache control by adding record identification information to partial write request | Akira Yamamoto, Shigeo Homma, Yoshihiro Asaka, Yoshiaki Kuwahara, Masafumi Nozawa +1 more | 1997-12-02 |
| 5606684 | On-line dumping system and disk sub-system | Toshio Nakano, Masafumi Nozawa, Kiyoshi Hisano, Akihito Ogino, Hiroyuki Kitajima +1 more | 1997-02-25 |
| 5497472 | Cache control method and apparatus for storing data in a cache memory and for indicating completion of a write request irrespective of whether a record to be accessed exists in an external storage unit | Akira Yamamoto, Shigeo Homma, Yoshihiro Asaka, Yoshiaki Kuwahara, Masafumi Nozawa +1 more | 1996-03-05 |
| 5410666 | On-line dumping system and disk sub system | Toshio Nakano, Masafumi Nozawa, Kiyoshi Hisano, Akihito Ogino, Hiroyuki Kitajima +1 more | 1995-04-25 |
| 5325506 | Method of changing the track and recording data | Mamoru Tohchi, Hisaharu Takeuchi, Yukihisa Kashima, Ikuo Kawaguchi | 1994-06-28 |
| 5315451 | Rotating storage track format emulation | Masahiro Nakayama, Hisaharu Takeuchi, Hisashi Takamatsu, Mamoru Tohchi | 1994-05-24 |
| 5253351 | Memory controller with a cache memory and control method of cache memory including steps of determining memory access threshold values | Akira Yamamoto, Toshiaki Tsuboi, Shigeo Honma, Hiroyuki Kitajima, Masafumi Nozawa +4 more | 1993-10-12 |
| 5226157 | Backup control method and system in data processing system using identifiers for controlling block data transfer | Toshio Nakano, Masafumi Nozawa, Kiyoshi Hisano, Masayuki Hoshino | 1993-07-06 |
| 5187778 | Buffered disk unit and method of transferring data therein | Akira Yamamoto, Hiroyuki Kitajima, Michio Miyazaki, Masafumi Nozawa, Takikazu Takeuchi | 1993-02-16 |
| 5179684 | Method of changing the track and recording data | Mamoru Tohchi, Hisaharu Takeuchi, Yukihisa Kashima, Ikuo Kawaguchi | 1993-01-12 |
| 5119488 | Input/output system implementing several access paths for rerouting data in the event one path fails | Hisashi Takamatsu, Hisaharu Takeuchi | 1992-06-02 |
| 4870565 | Parallel transfer type director means | Akira Yamamoto, Toru Nishigaki, Kiyoshi Hisano, Yoshiro Shiroyana | 1989-09-26 |