Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE48932 | Frame generating apparatus and frame generating method | Toru Katagiri | 2022-02-15 |
| RE47127 | Frame generating apparatus and frame generating method | Toru Katagiri | 2018-11-13 |
| 8977120 | Client signal accommodating multiplexing apparatus and method | Takuya Ohara, Takashi Ono, Shigeki Aisawa, Masahito Tomizawa, Hiroyuki Honma +1 more | 2015-03-10 |
| 8965197 | Method of switching optical transport network and node device | Katsuhiro Shirai, Koji Takeguchi, Takashi Honda | 2015-02-24 |
| 8824507 | Transmitting apparatus and signal transmitting method | Hiroyuki Honma, Toru Katagiri | 2014-09-02 |
| 8705974 | Optical transmission system and optical transmission method | Yohei Koganei, Osamu Takeuchi, Hayato Furukawa, Yasuhiko Aoki | 2014-04-22 |
| 8687655 | Signal demultiplexer, signal multiplexer, and signal multiplexer/demultiplexer | Toru Katagiri | 2014-04-01 |
| 8675684 | Frame generating apparatus and frame generating method | Toru Katagiri | 2014-03-18 |
| 8478137 | Optical receiver | Kosuke Komaki, Katsumi Fukumitsu, Osamu Takeuchi | 2013-07-02 |
| 8331793 | Optical transmission apparatus and method | Osamu Takeuchi, Yasuhiko Aoki, Hisao Nakashima | 2012-12-11 |
| 7940651 | Momentary-disconnection-free switching device | Mitsuhiro Kawaguchi, Hideki Matsui, Mitsumasa Matsuike | 2011-05-10 |
| 7778160 | Device for synchronizing between an active unit and a standby unit | Takashi Kaiga, Koichi Sugama, Tsutomu Chikazawa, Yukio Katayanagi, Kenichi Yajima +2 more | 2010-08-17 |
| 7639702 | Plug-in card for optical transmission apparatus | Hideki Matsui, Mitsuhiro Kawaguchi, Ryuji Kayama, Takashi Kaiga | 2009-12-29 |
| 7418203 | Diagnosis method for standby system of optical ring network | Junji Yamamoto | 2008-08-26 |
| 7225366 | Transport systems and method of monitoring burst error | Hideaki Arao | 2007-05-29 |
| 6895182 | Optical ring transmission system using squelch method | Junichi Moriyama, Tsutomu Chikazawa, Yoshihisa Ikeda, Takanori Yasui, Atsuki Taniguchi | 2005-05-17 |
| 6763038 | Light transmission equipment | Nobuhiko Usui, Koji Matsunaga, Masayuki Maehira, Tatsuya Toyozumi, Yumiko Ogata +1 more | 2004-07-13 |
| 6728925 | Error correcting method and apparatus | Junichi Ishiwatari, Atsuki Taniguchi, Takashi Kuwabara, Yukio Yamazaki | 2004-04-27 |
| 6587459 | Time slot assignment circuit | Yukio Suda, Satoshi Nemoto, Takashi Kuwabara | 2003-07-01 |
| 6343068 | Guard apparatus for avoiding malfunction in optical communication system | Chiyoko Yamamoto | 2002-01-29 |
| 6330237 | Time slot assignment circuit | Yukio Suda, Satoshi Nemoto, Yasuhiro Murakami | 2001-12-11 |
| 5909298 | Optical telecommunication apparatus for use in an optical ring network | Shozo Shimada, Kiyonori Kusuda, Hirofumi Imabayashi, Katsuya Fujii, Tetsuya Takahashi | 1999-06-01 |
| 5546403 | Bidirectional line switch ring network | Chiyoko Yamamoto, Daisuke Maruhashi | 1996-08-13 |
| 5537393 | BLSR network having path-AIS generation function | Daisuke Maruhashi | 1996-07-16 |