Takehiro Fujita

Person

Kawasaki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Information processing apparatus, meeting system, and method
- Patent number 11,804,974
- Issue date Oct 31, 2023
- Ricoh Company, Ltd.
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical wavelength multiplexing transmission apparatus and optical...
- Patent number 10,541,749
- Issue date Jan 21, 2020
- Fujitsu Limited
- Shigeru Ishii
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Measuring device, measurement method, and transmission system
- Patent number 9,647,793
- Issue date May 9, 2017
- Fujitsu Limited
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength division multiplexing transmission device
- Patent number 9,287,992
- Issue date Mar 15, 2016
- Fujitsu Limited
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical receiving device
- Patent number 8,923,694
- Issue date Dec 30, 2014
- Fujitsu Telecom Networks Limited
- Toshiki Honda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission quality determination method, transmission path select...
- Patent number 8,891,958
- Issue date Nov 18, 2014
- Fujitsu Limited
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission system and method of correcting tilt of the transmissi...
- Patent number 8,693,874
- Issue date Apr 8, 2014
- Fujitsu Limited
- Tomoyuki Suzuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system
- Patent number 8,681,420
- Issue date Mar 25, 2014
- Fujitsu Limited
- Yasushi Sugaya
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission device
- Patent number 8,682,167
- Issue date Mar 25, 2014
- Fujitsu Limited
- Hideki Kobayashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
WDM optical transmission system and control method thereof
- Patent number 8,615,167
- Issue date Dec 24, 2013
- Fujitsu Limited
- Yasushi Sugaya
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
WDM transmission apparatus, optical add-drop multiplexer and WDM tr...
- Patent number 8,306,427
- Issue date Nov 6, 2012
- Fujitsu Limited
- Ryosuke Goto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
WDM system
- Patent number 7,689,131
- Issue date Mar 30, 2010
- Fujitsu Limited
- Kimio Uekama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of upgrading optical node, and an optical node apparatus
- Patent number 7,650,072
- Issue date Jan 19, 2010
- Fujitsu Limited
- Miki Onaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission apparatus, continuity testing method therein,...
- Patent number 7,627,244
- Issue date Dec 1, 2009
- Fujitsu Limited
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength division multiplexing device, an optical leakage prevent...
- Patent number 7,619,813
- Issue date Nov 17, 2009
- Fujitsu Limited
- Taizo Maeda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of upgrading optical node, and an optical node apparatus
- Patent number 7,522,839
- Issue date Apr 21, 2009
- Fujitsu Limited
- Miki Onaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system having noise-elimination function
- Patent number 7,489,876
- Issue date Feb 10, 2009
- Fujitsu Limited
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multistage optical amplifier having tilt compensation feature
- Patent number 7,391,560
- Issue date Jun 24, 2008
- Fujitsu Limited
- Hidezumi Natori
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Switching control device for wavelength-division multiplexing optic...
- Patent number 7,313,327
- Issue date Dec 25, 2007
- Fujitsu Limited
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission device using a wide input dynamic range optica...
- Patent number 7,248,804
- Issue date Jul 24, 2007
- Fujitsu Limited
- Taizo Maeda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Parallel signal automatic phase adjusting circuit
- Patent number 7,139,347
- Issue date Nov 21, 2006
- Fujitsu Limited
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL SWITCHING DEVICE, OPTICAL SWITCHING SYSTEM, AND METHOD OF O...
- Publication number 20230199350
- Publication date Jun 22, 2023
- Fujitsu Limited
- Tatsuya TSUZUKI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
INFORMATION PROCESSING APPARATUS, MEETING SYSTEM, AND METHOD
- Publication number 20230068678
- Publication date Mar 2, 2023
- RICOH COMPANY, LTD.
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL WAVELENGTH MULTIPLEXING TRANSMISSION APPARATUS AND OPTICAL...
- Publication number 20190312641
- Publication date Oct 10, 2019
- Fujitsu Limited
- Shigeru ISHII
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
MEASURING DEVICE, MEASUREMENT METHOD, AND TRANSMISSION SYSTEM
- Publication number 20150333863
- Publication date Nov 19, 2015
- FUJITSU LIMITED
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL RECEIVING DEVICE
- Publication number 20130216219
- Publication date Aug 22, 2013
- Fujitsu Limited
- Toshiki Honda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WAVELENGTH DIVISION MULTIPLEXING TRANSMISSION DEVICE
- Publication number 20130148961
- Publication date Jun 13, 2013
- FUJITSU LIMITED
- Takehiro FUJITA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION QUALITY DETERMINATION METHOD, TRANSMISSION PATH SELECT...
- Publication number 20120230680
- Publication date Sep 13, 2012
- Fujitsu Limited
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WDM OPTICAL TRANSMISSION SYSTEM AND CONTROL METHOD THEREOF
- Publication number 20120063771
- Publication date Mar 15, 2012
- Fujitsu Limited
- Yasushi SUGAYA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMISSION SYSTEM
- Publication number 20120002270
- Publication date Jan 5, 2012
- Fujitsu Limited
- Yasushi SUGAYA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION SYSTEM AND METHOD OF CORRECTING TILT OF THE TRANSMISSI...
- Publication number 20100322633
- Publication date Dec 23, 2010
- FUJITSU TELECOM NETWORKS LIMITED
- Tomoyuki Suzuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WAVELENGTH DIVISION MULTIPLEXING APPARATUS AND DISPERSION COMPENSAT...
- Publication number 20100247095
- Publication date Sep 30, 2010
- FUJITSU LIMITED
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WDM TRANSMISSION APPARATUS, OPTICAL ADD-DROP MULTIPLEXER AND WDM TR...
- Publication number 20100158532
- Publication date Jun 24, 2010
- FUJITSU LIMITED
- Ryosuke GOTO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Communication network and design method
- Publication number 20100111536
- Publication date May 6, 2010
- FUJITSU LIMITED
- Shigeru Ishii
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHOD OF UPGRADING OPTICAL NODE, AND AN OPTICAL NODE APPARATUS
- Publication number 20090226167
- Publication date Sep 10, 2009
- FUJITSU LIMITED
- Miki Onaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMISSION DEVICE
- Publication number 20090162067
- Publication date Jun 25, 2009
- FUJITSU LIMITED
- Hideki Kobayashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method of upgrading optical node, and an optical node apparatus
- Publication number 20080002978
- Publication date Jan 3, 2008
- Miki Onaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Wdm system
- Publication number 20060285846
- Publication date Dec 21, 2006
- Kimio Uekama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission apparatus, continuity testing method therein,...
- Publication number 20060269284
- Publication date Nov 30, 2006
- FUJITSU LIMITED
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Wavelength division multiplexing device, an optical leakage prevent...
- Publication number 20060221435
- Publication date Oct 5, 2006
- FUJITSU LIMITED
- Taizo Maeda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission device using a wide input dynamic range optica...
- Publication number 20060127101
- Publication date Jun 15, 2006
- FUJITSU LIMITED
- Taizo Maeda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Multistage optical amplifier having tilt compensation feature
- Publication number 20050219682
- Publication date Oct 6, 2005
- FUJITSU LIMITED
- Hidezumi Natori
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission system having noise-elimination function
- Publication number 20050201754
- Publication date Sep 15, 2005
- FUJITSU LIMITED
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Switching control device for wavelength-division multiplexing optic...
- Publication number 20050135807
- Publication date Jun 23, 2005
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Parallel signal automatic phase adjusting circuit
- Publication number 20020191723
- Publication date Dec 19, 2002
- Takehiro Fujita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Takehiro Fujita

Person

Patents Grantslast 30 patents

Information processing apparatus, meeting system, and method

Optical wavelength multiplexing transmission apparatus and optical...

Measuring device, measurement method, and transmission system

Wavelength division multiplexing transmission device

Optical receiving device

Transmission quality determination method, transmission path select...

Transmission system and method of correcting tilt of the transmissi...

Optical transmission system

Optical transmission device

WDM optical transmission system and control method thereof

WDM transmission apparatus, optical add-drop multiplexer and WDM tr...

WDM system

Method of upgrading optical node, and an optical node apparatus

Optical transmission apparatus, continuity testing method therein,...

Wavelength division multiplexing device, an optical leakage prevent...

Method of upgrading optical node, and an optical node apparatus

Optical transmission system having noise-elimination function

Multistage optical amplifier having tilt compensation feature

Switching control device for wavelength-division multiplexing optic...

Optical transmission device using a wide input dynamic range optica...

Parallel signal automatic phase adjusting circuit

Patents Applicationslast 30 patents

OPTICAL SWITCHING DEVICE, OPTICAL SWITCHING SYSTEM, AND METHOD OF O...

INFORMATION PROCESSING APPARATUS, MEETING SYSTEM, AND METHOD

OPTICAL WAVELENGTH MULTIPLEXING TRANSMISSION APPARATUS AND OPTICAL...

MEASURING DEVICE, MEASUREMENT METHOD, AND TRANSMISSION SYSTEM

OPTICAL RECEIVING DEVICE

WAVELENGTH DIVISION MULTIPLEXING TRANSMISSION DEVICE

TRANSMISSION QUALITY DETERMINATION METHOD, TRANSMISSION PATH SELECT...

WDM OPTICAL TRANSMISSION SYSTEM AND CONTROL METHOD THEREOF

OPTICAL TRANSMISSION SYSTEM

TRANSMISSION SYSTEM AND METHOD OF CORRECTING TILT OF THE TRANSMISSI...

WAVELENGTH DIVISION MULTIPLEXING APPARATUS AND DISPERSION COMPENSAT...

WDM TRANSMISSION APPARATUS, OPTICAL ADD-DROP MULTIPLEXER AND WDM TR...

Communication network and design method

METHOD OF UPGRADING OPTICAL NODE, AND AN OPTICAL NODE APPARATUS

OPTICAL TRANSMISSION DEVICE

Method of upgrading optical node, and an optical node apparatus

Wdm system

Optical transmission apparatus, continuity testing method therein,...

Wavelength division multiplexing device, an optical leakage prevent...

Optical transmission device using a wide input dynamic range optica...

Multistage optical amplifier having tilt compensation feature

Optical transmission system having noise-elimination function

Switching control device for wavelength-division multiplexing optic...

Parallel signal automatic phase adjusting circuit