Issued Patents All Time
Showing 51–75 of 94 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7903975 | Optical add-drop multiplexer | Nobuhiko Kikuchi, Kenro Sekine | 2011-03-08 |
| 7781082 | Magnetic material | Shin-ichi Ohkoshi, Shunsuke Sakurai, Shiro Kuroki, Kimitaka Sato | 2010-08-24 |
| 7662727 | Method for manufacturing semiconductor device background | Hironobu Miya, Norikazu Mizuno, Masanori Sakai, Hirohisa Yamazaki | 2010-02-16 |
| 7653311 | Optical wavelength add-drop multiplexer | Nobuhiko Kikuchi, Kenro Sekine | 2010-01-26 |
| 7596322 | Cryptographic-key-generation communication system | Tatsuya Tomaru, Kiyotaka Hammura | 2009-09-29 |
| 7292785 | Optical transmission system constructing method and system | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 2007-11-06 |
| 7167652 | Optical transmission system constructing method and system | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 2007-01-23 |
| 7068871 | Optical wiring substrate, method of manufacturing optical wiring substrate and multilayer optical wiring | Akio Sugama, Masayuki Kato, Masatoshi Ishii, Tsuyoshi Aoki | 2006-06-27 |
| 6922508 | Optical switching apparatus with adiabatic coupling to optical fiber | Alexei Glebov, Michael G. Lee | 2005-07-26 |
| 6850663 | Equipments including transponder for optical fiber transmission | Nobuhiko Kikuchi | 2005-02-01 |
| 6810160 | Optical wiring substrate, method of manufacturing optical wiring substrate and multilayer optical wiring | Akio Sugama, Masayuki Kato, Masatoshi Ishii, Tsuyoshi Aoki | 2004-10-26 |
| 6728489 | Optical transmission system constructing method and system | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 2004-04-27 |
| 6700910 | Wavelength tunable laser and optical device | Masahiro Aoki, Tomonobu Tsuchiya, Hiroyuki Gomyo | 2004-03-02 |
| 6532320 | Equipments, transpondor and methods for optical fiber transmission | Nobuhiko Kikuchi | 2003-03-11 |
| 6472639 | Heat treatment method and heat treatment apparatus | Eisuke Nishitani, Katsuhisa Kasanami, Naoko Matsuyama | 2002-10-29 |
| 6414280 | Heat treatment method and heat treatment apparatus | Eisuke Nishitani, Katsuhisa Kasanami, Naoko Matsuyama | 2002-07-02 |
| 6397667 | Surface property measuring device | Nobuyoshi Fujii, Satoshi Ueda, Tamenori Shirai | 2002-06-04 |
| 6296492 | Receptacle for coaxial plug connector | Masaki Fujimoto, Shuji Kato, Kenji Okura, Yoshihisa Inaba, Takeshi Hashimoto +2 more | 2001-10-02 |
| 6266169 | Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 2001-07-24 |
| 6265721 | Energy-dispersive-type semiconductor x-ray detector | Shigetoshi Arai | 2001-07-24 |
| 6018405 | Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 2000-01-25 |
| 6005699 | Optical wavelength multiplexing system | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1999-12-21 |
| 5995278 | Optical transmission system | Nobuhiko Kikuchi | 1999-11-30 |
| 5880876 | Optical transmission system | Nobuhiko Kikuchi | 1999-03-09 |
| 5875046 | Optical repeater and optical transmitter | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1999-02-23 |