Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9397882 | Packet transport network system | — | 2016-07-19 |
| 8971172 | Network and fault recovery method | — | 2015-03-03 |
| 8705373 | Apparatus and method for packet forwarding | Katsuya Kitamori | 2014-04-22 |
| 8605576 | Communication network system, data transmission method, and node apparatus | Kenya Takuwa | 2013-12-10 |
| 8280244 | Optical ring network system | — | 2012-10-02 |
| 7986619 | Packet network system | — | 2011-07-26 |
| 6021112 | Path switching ring control apparatus in a synchronous (SDH) network that includes an asynchronous (PDH) subnetwork | — | 2000-02-01 |
| 5619189 | Communication system having two opposed data processing units each having function of monitoring the other data processing unit | — | 1997-04-08 |
| 5555248 | Tandem connection maintenance system | — | 1996-09-10 |
| 5535251 | System for synchronizing real time clock by transmitted real time information | — | 1996-07-09 |
| 5367567 | Subscriber apparatus with ringer generator for sending ringer signal to subscriber line | — | 1994-11-22 |
| 5313456 | Data link protecting system | — | 1994-05-17 |
| 4896317 | Supervisory system for a primary group digital transmission line | Noboru Nakama, Hideyuki Motoori, Atsushi Suzuki, Naoyuki Kato | 1990-01-23 |