Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8634426 | Transmission device with function of packetizing and transmitting | Yoshio Nogi, Masatoshi Shibasaki, Yoshihiro Ashi, Kazutaka Sakai | 2014-01-21 |
| 7769257 | Optical transmission system and signal speed converting apparatus | Nobuhiko Kikuchi, Takao Fukushima, Hiroyuki Nakano | 2010-08-03 |
| 7292785 | Optical transmission system constructing method and system | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 2007-11-06 |
| 7167652 | Optical transmission system constructing method and system | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 2007-01-23 |
| 6728489 | Optical transmission system constructing method and system | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 2004-04-27 |
| 6266169 | Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 2001-07-24 |
| 6018405 | Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 2000-01-25 |
| 6005699 | Optical wavelength multiplexing system | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 1999-12-21 |
| 5875046 | Optical repeater and optical transmitter | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 1999-02-23 |
| 5861972 | Optical multiplex transmission equipment and method | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 1999-01-19 |
| 5812289 | Optical repeater and optical transmitter | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 1998-09-22 |
| 5739932 | Optical transmission system constructing method and system | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 1998-04-14 |
| 5671074 | Optical multiplex transmission equipment and method | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 1997-09-23 |
| 5555477 | Optical transmission system constructing method and system | Keiji Tomooka, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki +6 more | 1996-09-10 |
| 5500756 | Optical fiber transmission system and supervision method of the same | Hideaki Tsushima, Shinya Sasaki, Yukio Nakano, Hiroyuki Nakano, Ryoji Tateyari +9 more | 1996-03-19 |