Issued Patents All Time
Showing 51–75 of 85 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5940289 | Parallel database system retrieval method of a relational database management system using initial data retrieval query and subsequent sub-data utilization query processing for minimizing query time | Morihiro Iwata, Masashi Tsuchida, Norihiro Hara | 1999-08-17 |
| 5875046 | Optical repeater and optical transmitter | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1999-02-23 |
| 5861972 | Optical multiplex transmission equipment and method | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1999-01-19 |
| 5818853 | ATM switch and control method thereof | Takahiko Kozaki, Shinobu Gohara, Yoshihiro Ashi | 1998-10-06 |
| 5812289 | Optical repeater and optical transmitter | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1998-09-22 |
| 5806059 | Database management system and method for query process for the same | Masashi Tsuchida, Nobuo Kawamura, Kazuyoshi Negishi, Shunichi Torii | 1998-09-08 |
| 5739932 | Optical transmission system constructing method and system | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1998-04-14 |
| 5671074 | Optical multiplex transmission equipment and method | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1997-09-23 |
| 5586115 | Add-drop multiplexer | Keiji Tomooka | 1996-12-17 |
| 5577037 | Method of processing inclusively STM signals and ATM signals and switching system employing the same | Masahiro Takatori, Yoshihiro Ashi | 1996-11-19 |
| 5557621 | ATM switch and control method thereof | Takahiko Kozaki, Shinobu Gohara, Yoshihiro Ashi | 1996-09-17 |
| 5555477 | Optical transmission system constructing method and system | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1996-09-10 |
| 5550805 | Failure restoration method in a mesh network | Masahiro Takatori, Yoshihiro Ashi | 1996-08-27 |
| 5544122 | Multiplexed multi-write port semiconductor memory | Masao Mizukami, Yoichi Sato, Satoshi Shinagawa | 1996-08-06 |
| 5500756 | Optical fiber transmission system and supervision method of the same | Hideaki Tsushima, Shinya Sasaki, Hiroyuki Nakano, Ryoji Tateyari, Hironari Matsuda +9 more | 1996-03-19 |
| 5475676 | Switch for self-healing ring | Masahiro Takatori, Yoshihiro Ashi, Hiroyuki Fujita | 1995-12-12 |
| 5473598 | Routing method and apparatus for switching between routing and conversion tables based on selection information included in cells to be routed | Masahiro Takatori, Yoshihiro Ashi, Tadayuki Kanno | 1995-12-05 |
| 5438445 | Optical wavelength multiplexing communication system | — | 1995-08-01 |
| 5420859 | Method of modifying virtual path capacity | Akihiko Takase | 1995-05-30 |
| 5402242 | Method of and an apparatus for measuring a concentration of a fluid | — | 1995-03-28 |
| 5359600 | High throughput supervisory system for ATM switching systems transporting STM-N signals | Hiromi Ueda, Kenji Akutsu, Ryuichi Ikematsu, Takatoshi Kurano, Yoshihiro Ashi +2 more | 1994-10-25 |
| 5351238 | Method of controlling a frame phase of a time-division switch and frame phase variable time-division switch | Yoshihiro Ashi, Kenji Takeda | 1994-09-27 |
| 5331639 | Method and apparatus for frame phase conversion of signal having frame structure | Masahiro Takatori, Keiichi Ishida, Takashi Mori, Yoshihiro Ashi, Tadayuki Kanno +1 more | 1994-07-19 |
| 5321688 | Method and apparatus for transmission of failure information of virtual path in ATM network | Yoshihiro Ashi | 1994-06-14 |
| 5315581 | Hit-less protection switching method and apparatus for ATM transmission lines | Akihiko Takase, Masahiro Takatori, Junichirou Yanagi | 1994-05-24 |