Issued Patents All Time
Showing 1–25 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11923968 | Optical transmission device, optical transmission system and method of updating the optical transmission device | — | 2024-03-05 |
| 10917350 | Transmission device and network system | — | 2021-02-09 |
| 10848840 | Communication apparatus and signal relay method | Toru Katagiri, Hiroshi Tomonaga | 2020-11-24 |
| 10742543 | Transmission apparatus and redundancy method | — | 2020-08-11 |
| 10009262 | Transmission apparatus and redundancy method | — | 2018-06-26 |
| 9716650 | Communication system and transfer apparatus | — | 2017-07-25 |
| 9391694 | Protection path providing method and transmission device | — | 2016-07-12 |
| 9369786 | Optical transmission device and optical transmission network system | — | 2016-06-14 |
| 9264283 | Method of accommodating signals, frame generation apparatus, frame reception apparatus, and transmission system | Toru Katagiri | 2016-02-16 |
| 9154326 | Transmission apparatus, failure recovery method, and network system | Toru Katagiri | 2015-10-06 |
| 9075769 | Communication control device and communication control method | — | 2015-07-07 |
| 9048966 | Optical transmission apparatus | — | 2015-06-02 |
| 8917592 | Communication apparatus, system, and method | — | 2014-12-23 |
| 8873380 | System and method for setting redundant path segments in a multi-ring communication network | — | 2014-10-28 |
| 8737201 | Data relay apparatus, and ring-type communication system | — | 2014-05-27 |
| 8441923 | Communication path providing method and communication apparatus | — | 2013-05-14 |
| 8432792 | Node apparatus, ring network, and protection path bandwidth control method | Yasuki Fujii, Shinya Kano, Ryoichi Mutoh | 2013-04-30 |
| 8208469 | Communication system and apparatus | — | 2012-06-26 |
| 8174963 | Data relay apparatus and failure recovery method | — | 2012-05-08 |
| 7961602 | Method and device using a backup communication path to transmit excess traffic | — | 2011-06-14 |
| 7929451 | Switch and packet forwarding method | — | 2011-04-19 |
| 7912329 | Optical-switch testing apparatus, optical-signal switching apparatus, optical-switch testing method, and control method for optical-signal switching | Yoshio Sakai, Kazuyuki Mori, Atsuo Ishizuka | 2011-03-22 |
| 7907516 | Node setting apparatus, network system, node setting method, and computer product | Akio Endo | 2011-03-15 |
| 7821971 | Protection providing method and customer edge apparatus | — | 2010-10-26 |
| 7596290 | Optical-switch testing apparatus, optical-signal switching apparatus, optical-switch testing method, and control method for optical-signal switching | Yoshio Sakai, Kazuyuki Mori, Atsuo Ishizuka | 2009-09-29 |