Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9690677 | Transmission device, transmission system, and transmission method | Yutaka Hayama, NOBUYUKI FUKUCHI, Kouji Kurihara, Yasushi Tateno | 2017-06-27 |
| 9602395 | Apparatus and method for switching communication channels having redundant configuration | Toshiyuki Sakamoto, Yutaka Hayama, Hiroshi Fukaya, Kouji Kurihara | 2017-03-21 |
| 7778160 | Device for synchronizing between an active unit and a standby unit | Takashi Kaiga, Koichi Sugama, Yukio Katayanagi, Kenichi Yajima, Hideo Abe +2 more | 2010-08-17 |
| 7408475 | Power supply monitoring device | Koichi Sugama, Noboru Shimizu, Ryuji Kayama, Kenichi Yajima, Yukio Katayanagi +1 more | 2008-08-05 |
| 7263062 | Transmission apparatus with a function to switch a line in the event of a transmission failure | Atsushi Suzuki | 2007-08-28 |
| 6895182 | Optical ring transmission system using squelch method | Junichi Moriyama, Yoshihisa Ikeda, Takanori Yasui, Atsuki Taniguchi, Masahiro Shioda | 2005-05-17 |
| 5818816 | Communication device for switching connection from a working channel line to a protection channel line and vice versa | Jun Wakabayashi, Masaaki Iwasaki, Seiji Nakazumi | 1998-10-06 |