Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9226050 | Transmission apparatus and transmission method | Koichi Sugama, Masashige Kawarai, Hiroyuki Ishii, Yukio Katayanagi, Kenichi Hasegawa +2 more | 2015-12-29 |
| 8767802 | Transmission device and transmission method | Yuichi Nagaki, Masashige Kawarai, Koichi Sugama, Tomohiro Ueno, Yukio Katayanagi | 2014-07-01 |
| 7778160 | Device for synchronizing between an active unit and a standby unit | Koichi Sugama, Tsutomu Chikazawa, Yukio Katayanagi, Kenichi Yajima, Hideo Abe +2 more | 2010-08-17 |
| 7639702 | Plug-in card for optical transmission apparatus | Hideki Matsui, Mitsuhiro Kawaguchi, Masahiro Shioda, Ryuji Kayama | 2009-12-29 |
| 7408475 | Power supply monitoring device | Koichi Sugama, Noboru Shimizu, Tsutomu Chikazawa, Ryuji Kayama, Kenichi Yajima +1 more | 2008-08-05 |