Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7636299 | Packet repeater | Kenichi Kawarai, Hideji Abe, Osamu Tsurumi, Hiroyuki Kaneko | 2009-12-22 |
| 7440397 | Protection that automatic and speedily restore of Ethernet ring network | Osamu Tsurumi, Kenichi Kawarai, Akio Endou, Kazukuni Ugai | 2008-10-21 |