Tetsuya Kiyonaga

Person

Kawasaki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical transmitter device
- Patent number 7,215,894
- Issue date May 8, 2007
- Fujitsu Limited
- Yuka Kobayashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical receiving device
- Patent number 7,031,621
- Issue date Apr 18, 2006
- Fujitsu Limited
- Yasunori Nagakubo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
APD bias circuit
- Patent number 6,643,472
- Issue date Nov 4, 2003
- Fujitsu Limited
- Hisaya Sakamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical communication system, optical receiver and wavelength conve...
- Patent number 6,594,070
- Issue date Jul 15, 2003
- Fujitsu Limited
- Akihiko Sugata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmitter
- Patent number 6,590,686
- Issue date Jul 8, 2003
- Fujitsu Limited
- Motoyoshi Sekiya
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission apparatus for multiple wavelengths and optical...
- Patent number 6,501,774
- Issue date Dec 31, 2002
- Fujitsu Limited
- Hiroshi Kuwahara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
WDM optical transmission apparatus
- Patent number 6,483,625
- Issue date Nov 19, 2002
- Fujitsu Limited
- Yoshitaka Shimura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electronic circuit module, electronic circuit module connecting str...
- Patent number 6,282,098
- Issue date Aug 28, 2001
- Fujitsu Limited
- Makoto Totani
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Laser diode protecting circuit and laser driving current control ci...
- Patent number 6,229,833
- Issue date May 8, 2001
- Fujitsu Limited
- Mitsuharu Noda
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Clock extraction circuit
- Patent number 6,188,738
- Issue date Feb 13, 2001
- Fujitsu Limited
- Hisaya Sakamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Laser diode protecting circuit
- Patent number 6,097,746
- Issue date Aug 1, 2000
- Fujitsu Limited
- Mitsuharu Noda
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Clock signal detection circuit
- Patent number 6,065,129
- Issue date May 16, 2000
- Fujitsu Limited
- Hisaya Sakamoto
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Synchronization control unit which maintains synchronization betwee...
- Patent number 5,808,571
- Issue date Sep 15, 1998
- Fujitsu Limited
- Naoki Kuwata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data decision circuit used in optical parallel receiving module, op...
- Patent number 5,652,767
- Issue date Jul 29, 1997
- Fujitsu Limited
- Tetsuya Kiyonaga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Demodulator and a polarization diversity receiver for coherent opti...
- Patent number 5,253,097
- Issue date Oct 12, 1993
- Fujitsu Limited
- Takao Naito
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Receiver for coherent optical communication
- Patent number 5,115,332
- Issue date May 19, 1992
- Fujitsu Limited
- Takao Naito
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Heterodyne receiver for coherent optical communication
- Patent number 5,052,051
- Issue date Sep 24, 1991
- Fujitsu Limited
- Takao Naito
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Direct modulation phase-shift-keying system and method
- Patent number 5,050,176
- Issue date Sep 17, 1991
- Fujitsu Limited
- Takao Naito
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dual balanced optical signal receiver
- Patent number 5,003,626
- Issue date Mar 26, 1991
- Fujitsu Limited
- Hideo Kuwahara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Polarization diversity optical receiver for coherent optical commun...
- Patent number 4,965,858
- Issue date Oct 23, 1990
- Fujitsu Limited
- Takao Naito
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Optical transmitter and method for controlling optical transmitter
- Publication number 20070160374
- Publication date Jul 12, 2007
- FUJITSU LIMITED
- Kensuke Matsui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method and apparatus for controlling extinction ratio of light-emit...
- Publication number 20070076771
- Publication date Apr 5, 2007
- FUJITSU LIMITED
- Takahiro Fujimoto
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Optical transmitter device
- Publication number 20060088322
- Publication date Apr 27, 2006
- FUJITSU LIMITED
- Yuka Kobayashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical modulating apparatus
- Publication number 20050105917
- Publication date May 19, 2005
- Hidehiko Narusawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical receiving device
- Publication number 20050100350
- Publication date May 12, 2005
- FUJITSU LIMITED
- Yasunori Nagakubo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission apparatus for multiple wavelengths and optical...
- Publication number 20020126367
- Publication date Sep 12, 2002
- FUJITSU LIMITED
- Hiroshi Kuwahara
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Optical communication system, optical receiver and wavelength conve...
- Publication number 20020089737
- Publication date Jul 11, 2002
- FUJITSU LIMITED
- Akihiko Sugata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WDM optical transmission apparatus
- Publication number 20020037020
- Publication date Mar 28, 2002
- FUJITSU LIMITED
- Yoshitaka Shimura
- H01 - BASIC ELECTRIC ELEMENTS

Tetsuya Kiyonaga

Person

Patents Grantslast 30 patents

Optical transmitter device

Optical receiving device

APD bias circuit

Optical communication system, optical receiver and wavelength conve...

Optical transmitter

Optical transmission apparatus for multiple wavelengths and optical...

WDM optical transmission apparatus

Electronic circuit module, electronic circuit module connecting str...

Laser diode protecting circuit and laser driving current control ci...

Clock extraction circuit

Laser diode protecting circuit

Clock signal detection circuit

Synchronization control unit which maintains synchronization betwee...

Data decision circuit used in optical parallel receiving module, op...

Demodulator and a polarization diversity receiver for coherent opti...

Receiver for coherent optical communication

Heterodyne receiver for coherent optical communication

Direct modulation phase-shift-keying system and method

Dual balanced optical signal receiver

Polarization diversity optical receiver for coherent optical commun...

Patents Applicationslast 30 patents

Optical transmitter and method for controlling optical transmitter

Method and apparatus for controlling extinction ratio of light-emit...

Optical transmitter device

Optical modulating apparatus

Optical receiving device

Optical transmission apparatus for multiple wavelengths and optical...

Optical communication system, optical receiver and wavelength conve...

WDM optical transmission apparatus