Inventor · disambiguated record
Tomoaki Takeyama
Also filed as: TAKEYAMA TOMOAKI
42 granted patents·5 pending applications·92 citations·filing 2001–2024
96Inventor score
Top patents by PatentIndex Score
47 records- 0187US11870553B2Fiber-optic communication apparatus, fiber-optic communication system, and optical power control methodFUJITSU LTD·Filed 2022·Granted Jan 9, 2024·1 cites·16 claims
- 0286US7085043B2Optical amplifierFUJITSU LTD·Filed 2005·Granted Aug 1, 2006·10 cites·17 claims
- 0384US7236294B2Optical amplifierFUJITSU LTD·Filed 2005·Granted Jun 26, 2007·9 cites·21 claims
- 0481US7616848B2Optical transmission apparatusFUJITSU LTD·Filed 2007·Granted Nov 10, 2009·8 cites·3 claims
- 0580US10644823B2Optical transfer system, control device, optical transfer method, and transfer deviceFUJITSU LTD·Filed 2019·Granted May 5, 2020·3 cites·14 claims
- 0678US8553318B2Optical amplifying device, gain control method, optical transmission device, and gain control deviceTAKEYAMA TOMOAKI·Filed 2011·Granted Oct 8, 2013·4 cites·14 claims
- 0774US10634974B2Wavelength converter, wavelength conversion method, and transmission deviceFUJITSU LTD·Filed 2019·Granted Apr 28, 2020·2 cites·12 claims
- 0874US7330303B2Wavelength division multiplexed optical amplifierFUJITSU LTD·Filed 2004·Granted Feb 12, 2008·12 cites·12 claims
- 0973US10782589B2Wavelength conversion apparatus, optical parametric amplifier, transmission apparatus, and optical transmission systemFUJITSU LTD·Filed 2019·Granted Sep 22, 2020·2 cites·14 claims
- 1073US7990608B2Optical transmission systemFUJITSU LTD·Filed 2007·Granted Aug 2, 2011·4 cites·13 claims
- 1170US11063684B2Optical transmission system, optical transmission apparatus and transmission methodFUJITSU LTD·Filed 2019·Granted Jul 13, 2021·2 cites·8 claims
- 1270US8116626B2Optical transmission apparatus and optical attenuation amount control methodTAKEYAMA TOMOAKI·Filed 2009·Granted Feb 14, 2012·4 cites·8 claims
- 1369US8390923B2Optical amplifier and optical amplification methodTAKEYAMA TOMOAKI·Filed 2010·Granted Mar 5, 2013·2 cites·19 claims
- 1469US6625362B2Dispersion compensating optical fiberFUJITSU LTD·Filed 2001·Granted Sep 23, 2003·11 cites·9 claims
- 1568US9509370B2Optical transmission system and optical transmission deviceFUJITSU LTD·Filed 2014·Granted Nov 29, 2016·2 cites·20 claims
- 1668US8351112B2Optical amplifierFUJITSU LTD·Filed 2011·Granted Jan 8, 2013·2 cites·11 claims
- 1767US6738182B2Optical fiber amplifierFUJITSU LTD·Filed 2001·Granted May 18, 2004·8 cites·38 claims
- 1865US9520694B2Optical amplifier with loss adjustment unit based on gainFUJITSU LTD·Filed 2015·Granted Dec 13, 2016·1 cites·4 claims
- 1964US10754224B2Wavelength conversion device, transmission device, and transmission systemFUJITSU LTD·Filed 2019·Granted Aug 25, 2020·0 cites·12 claims
- 2061US7136219B2Optical amplifier using delayed phase matching fiberFUJITSU LTD·Filed 2005·Granted Nov 14, 2006·1 cites·9 claims
- 2156US12334979B2Optical wavelength multiplexing transmission device and optical wavelength multiplexing transmission methodFUJITSU LTD·Filed 2022·Granted Jun 17, 2025·0 cites·8 claims
- 2255US8026538B2Photo-detecting apparatus and photo-detecting methodFUJITSU LTD·Filed 2008·Granted Sep 27, 2011·0 cites·3 claims
- 2355US7139453B2Variable dispersion compensator utilizing wavelength conversionFUJITSU LTD·Filed 2004·Granted Nov 21, 2006·4 cites·65 claims
- 2455US2025062835A1Transmission line parameter estimation apparatus and transmission line parameter estimation methodFUJITSU LTD·Filed 2024·Application pending·0 cites
- 2555US2024106560A1Wavelength conversion device and optical transmission systemFUJITSU LTD·Filed 2023·Application pending·0 cites
- 2653US11509394B2Controller and control method for Raman amplifierFUJITSU LTD·Filed 2021·Granted Nov 22, 2022·0 cites·8 claims
- 2749US11018763B2Network system, management device, and management methodFUJITSU LTD·Filed 2020·Granted May 25, 2021·0 cites·9 claims
- 2849US8922876B2Optical amplifying device and optical transmission systemTAKEYAMA TOMOAKI·Filed 2012·Granted Dec 30, 2014·0 cites·14 claims
- 2949US8194309B2Optical amplifier using delayed phase matching fiberSHIMIZU TAKASHI·Filed 2006·Granted Jun 5, 2012·0 cites·6 claims
- 3049US8027082B2Raman amplifier and excitation light source used thereofFUJITSU LTD·Filed 2007·Granted Sep 27, 2011·0 cites·12 claims
- 3148US2022385373A1Wavelength converter, optical communication apparatus, and optical waveguide substrateFUJITSU LTD·Filed 2022·Application pending·0 cites
- 3247US8077383B2Optical amplifierTAKEYAMA TOMOAKI·Filed 2008·Granted Dec 13, 2011·0 cites·16 claims
- 3346US9042005B2Raman fiber amplifier and its control via path switchingFUJITSU LTD·Filed 2013·Granted May 26, 2015·0 cites·12 claims
- 3446US9001413B2Control circuit, control method, and transmission systemFUJITSU LTD·Filed 2013·Granted Apr 7, 2015·0 cites·9 claims
- 3545US11294258B2Transmission device and transmission systemFUJITSU LTD·Filed 2020·Granted Apr 5, 2022·0 cites·10 claims
- 3644US8879145B2Raman amplifierFUJITSU LTD·Filed 2013·Granted Nov 4, 2014·0 cites·8 claims
- 3744US8854727B2Optical amplifier and transmission systemFUJITSU LTD·Filed 2013·Granted Oct 7, 2014·0 cites·5 claims
- 3844US2020059313A1Transmission device and transmission methodFUJITSU LTD·Filed 2019·Application pending·0 cites
- 3943US7643206B2Optical amplifierFUJITSU LTD·Filed 2006·Granted Jan 5, 2010·0 cites·7 claims
- 4042US10972188B2Transmission apparatus and transmission methodFUJITSU LTD·Filed 2019·Granted Apr 6, 2021·0 cites·2 claims
- 4142US9991985B2Optical transmission control device and optical signal wavelength determination methodFUJITSU LTD·Filed 2017·Granted Jun 5, 2018·0 cites·6 claims
- 4242US8498045B2Optical amplifierTAKEYAMA TOMOAKI·Filed 2010·Granted Jul 30, 2013·0 cites·9 claims
- 4342US8379299B2Optical amplifierFUJITSU LTD·Filed 2010·Granted Feb 19, 2013·0 cites·9 claims
- 4441US11153014B2Transmitting apparatus and transmitting methodFUJITSU LTD·Filed 2020·Granted Oct 19, 2021·0 cites·6 claims
- 4537US8363309B2Optical amplifier and method for suppressing polarization dependent gain of optical amplifierFUJITSU LTD·Filed 2010·Granted Jan 29, 2013·0 cites·16 claims
- 4637US2012045212A1Optical amplification device, communication system, and amplification methodTAKEYAMA TOMOAKI·Filed 2011·Application pending·0 cites
- 4735US9887778B2Optical amplifier, optical transmission apparatus, and optical repeating apparatusFUJITSU LTD·Filed 2016·Granted Feb 6, 2018·0 cites·15 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →