Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7693092 | Multicast tree monitoring method and system in IP network | — | 2010-04-06 |
| 7496055 | Layer 2 loop detection system | Kiichi Sugitani, Ryouichi Mutoh | 2009-02-24 |
| 7287065 | Data distribution system and network cache apparatus, data distribution server, and access server used for the same | Satoshi Kuroyanagi | 2007-10-23 |
| 7171119 | Optical path cross-connect system with high expanding characteristic | Satoshi Kuroyanagi | 2007-01-30 |
| 7146102 | Optical cross-connect device | Satoshi Kuroyanagi | 2006-12-05 |
| 7043158 | Optical path crossconnect system with high expanding characteristic | Satoshi Kuroyanagi | 2006-05-09 |
| 6842554 | Optical cross-connect device and optical network | Satoshi Kuroyanagi | 2005-01-11 |
| 6792176 | Optical switch expanding method, optical switch, and optical crossconnecting apparatus | Satoshi Kuroyanagi | 2004-09-14 |
| 6768573 | Polarization control optical space switch | Takuji Maeda, Satoshi Kuroyanagi, Tsuyoshi Yamamoto | 2004-07-27 |
| 6741811 | Optical cross-connect device and system having the device | Satoshi Kuroyanagi, Ichiro Nakajima, Takuji Maeda, Toru Katagiri | 2004-05-25 |
| 6708000 | Photonic node, photonic nodes for transmission and reception, and method of restoring traffic upon occurrence of link failure in optical path network | Satoshi Kuroyanagi | 2004-03-16 |
| 6643422 | Optical switch changeover controlling method, optical node device and optical switch system | Toru Katagiri, Satoshi Kuroyanagi, Ichiro Nakajima, Takuji Maeda | 2003-11-04 |
| 6496289 | Optical exchanger | Satoshi Kuroyanagi, Takuji Maeda, Isao Tsuyama, Ichiro Nakajima | 2002-12-17 |
| 6433900 | Optical wavelength multiplexing system having a redundant configuration | Satoshi Kuroyanagi, Ichiro Nakajima, Takuji Maeda, Isao Tsuyama | 2002-08-13 |
| 6285473 | Polarization control optical space switch | Takuji Maeda, Satoshi Kuroyanagi, Tsuyoshi Yamamoto | 2001-09-04 |
| 6154583 | Optical switch | Satoshi Kuroyanagi, Takuji Maeda, Isao Tsuyama, Ichiro Nakajima | 2000-11-28 |
| 6134031 | Polarization control optical space switch | Takuji Maeda, Satoshi Kuroyanagi, Tsuyoshi Yamamoto | 2000-10-17 |
| 6072610 | Optical transmission system | Satoshi Kuroyanagi, Kazuo Hironishi, Takuji Maeda | 2000-06-06 |
| 5974458 | Data transfer accounting device and method for performing an accounting process including an accounting information collecting process | Jin Abe | 1999-10-26 |
| 5949757 | Packet flow monitor and control system | Masafumi Katoh, Takeshi Kawasaki, Naotoshi Watanabe, Toshio Soumiya, Koji Nakamichi +3 more | 1999-09-07 |
| 5561002 | Electrode for alkaline storage battery and method of manufacturing | Takeshi Sakamoto, Takafumi Uemiya, Ayao Kariya, Toru Terao | 1996-10-01 |
| 5458664 | Particulate trap for purifying diesel engine exhaust | Masayuki Ishii, Masaaki Honda, Satoru Okamoto | 1995-10-17 |