Inventor
Tomoaki Takeyama
Inventor
Kawasaki, JP
Overview
Patents· 37 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Bprimary
H04BTransmission38%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light32%
H04JMultiplex communication14%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein6%
G02BOptical elements, systems or apparatus4%
B82YSpecific uses or applications of nanostructures1%
C03BManufacture, shaping, or supplementary processes1%
H04LTransmission of digital information, e.g. telegraphic communication1%
H04QSelecting1%
H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation1%
PatentTitleYear
11,063,684Optical transmission system, optical transmission apparatus and transmission method202111,018,763Network system, management device, and management method202110,972,188Transmission apparatus and transmission method202110,782,589Wavelength conversion apparatus, optical parametric amplifier, transmission apparatus, and optical transmission system202010,754,224Wavelength conversion device, transmission device, and transmission system202010,644,823Optical transfer system, control device, optical transfer method, and transfer device202010,634,974Wavelength converter, wavelength conversion method, and transmission device20209,991,985Optical transmission control device and optical signal wavelength determination method20189,887,778'Optical amplifier, optical transmission apparatus, and optical repeating apparatus'20189,520,694'Optical amplifier with loss adjustment unit based on gain'20169,509,370'Optical transmission system and optical transmission device'20169,042,005'Raman fiber amplifier and its control via path switching'20159,001,413'Control circuit, control method, and transmission system'20158,922,876'Optical amplifying device and optical transmission system'20148,879,145'Raman amplifier'20148,854,727'Optical amplifier and transmission system'20148,553,318'Optical amplifying device, gain control method, optical transmission device, and gain control device'20138,498,045'Optical amplifier'20138,390,923'Optical amplifier and optical amplification method'20138,379,299'Optical amplifier'20138,363,309'Optical amplifier and method for suppressing polarization dependent gain of optical amplifier'20138,351,112'Optical amplifier'20138,194,309'Optical amplifier using delayed phase matching fiber'20128,116,626'Optical transmission apparatus and optical attenuation amount control method'20128,077,383'Optical amplifier'20118,026,538'Photo-detecting apparatus and photo-detecting method'20118,027,082'Raman amplifier and excitation light source used thereof'20117,990,608'Optical transmission system'20117,643,206'Optical amplifier'20107,616,848'Optical transmission apparatus'20097,330,303'Wavelength division multiplexed optical amplifier'20087,236,294'Optical amplifier'20077,139,453'Variable dispersion compensator utilizing wavelength conversion'20067,136,219'Optical amplifier using delayed phase matching fiber'20067,085,043'Optical amplifier'20066,738,182'Optical fiber amplifier'20046,625,362'Dispersion compensating optical fiber'2003Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2003–2021Patents assigned to FUJITSU LTD (37)· patent assignee history
2003–2013Based in Kawasaki, JP· patent location history
2006–2021Based in Yokohama, JP· patent location history
2011–2014Patents assigned to TAKEYAMA TOMOAKI (10)· patent assignee history
2011–2013Patents assigned to SASAKI KEIKO (4)· patent assignee history
2011–2013Patents assigned to MURO SHINICHIROU (3)· patent assignee history
2014Patents assigned to FUJITSU TELECOM NETWORKS LTD (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FUJITSU LTD | 37 | 2003–2021 |
| TAKEYAMA TOMOAKIself | 10 | 2011–2014 |
| SASAKI KEIKO | 4 | 2011–2013 |
| MURO SHINICHIROU | 3 | 2011–2013 |
| FUJITSU TELECOM NETWORKS LTD | 1 | 2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kawasaki, JP | 20 | 2003–2013 |
| Yokohama, JP | 17 | 2006–2021 |