Inventor · disambiguated record
Yuichi Akiyama
Also filed as: AKIYAMA YUICHI
74 granted patents·5 pending applications·995 citations·filing 1984–2020
99Inventor score
Top patents by PatentIndex Score
79 records- 0199US9419720B2Optical signal transmitterFUJITSU LTD·Filed 2015·Granted Aug 16, 2016·57 cites·3 claims
- 0297US8472810B2Optical signal transmitter and method for controlling polarization multiplexed optical signalAKIYAMA YUICHI·Filed 2010·Granted Jun 25, 2013·68 cites·11 claims
- 0397US8412047B2Polarization multiplexed light transmitter and control method thereofTANAKA TOSHIKI·Filed 2009·Granted Apr 2, 2013·57 cites·7 claims
- 0497US7817923B2Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising themFUJITSU LTD·Filed 2005·Granted Oct 19, 2010·55 cites·37 claims
- 0596US8249464B2Optical receiver and method for optical receptionODA SHOICHIRO·Filed 2010·Granted Aug 21, 2012·32 cites·20 claims
- 0696US7657190B2Optical transmitter apparatusFUJITSU LTD·Filed 2006·Granted Feb 2, 2010·35 cites·7 claims
- 0795US8879925B2Optical transmitter and optical transmission methodAKIYAMA YUICHI·Filed 2011·Granted Nov 4, 2014·22 cites·9 claims
- 0894US8582981B2Optical transmitter and control method thereforAKIYAMA YUICHI·Filed 2008·Granted Nov 12, 2013·28 cites·13 claims
- 0994US8565616B2Polarized-wave-multiplexing optical transmitter and control method of polarized-wave-multiplexed optical signalTANAKA TOSHIKI·Filed 2011·Granted Oct 22, 2013·13 cites·8 claims
- 1094US8400702B2Optical modulation device and optical modulation methodTANAKA TOSHIKI·Filed 2010·Granted Mar 19, 2013·11 cites·8 claims
- 1192US8457503B2Optical transmitter apparatusAKIYAMA YUICHI·Filed 2011·Granted Jun 4, 2013·12 cites·2 claims
- 1291US8867927B2Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising themAKIYAMA YUICHI·Filed 2010·Granted Oct 21, 2014·7 cites·12 claims
- 1391US7848659B2Optical transmitting apparatus and optical communication systemFUJITSU LTD·Filed 2005·Granted Dec 7, 2010·22 cites·19 claims
- 1491US7792428B2Optical add/drop multiplexerFUJITSU LTD·Filed 2005·Granted Sep 7, 2010·12 cites·13 claims
- 1591US7773283B2Optical modulation device and optical modulation methodFUJITSU LTD·Filed 2008·Granted Aug 10, 2010·16 cites·12 claims
- 1690US7907324B2Optical modulator and controlling method and apparatus thereofFUJITSU LTD·Filed 2008·Granted Mar 15, 2011·12 cites·31 claims
- 1789US8145069B2Optical transmitterTANAKA TOSHIKI·Filed 2007·Granted Mar 27, 2012·16 cites·9 claims
- 1889US7853148B2Optical add/drop multiplexerFUJITSU LTD·Filed 2009·Granted Dec 14, 2010·10 cites·19 claims
- 1988US7936998B2Optical transmitter apparatusFUJITSU LTD·Filed 2009·Granted May 3, 2011·10 cites·1 claims
- 2088US6661974B1Optical transmitter and optical transmission systemFUJITSU LTD·Filed 1999·Granted Dec 9, 2003·102 cites·26 claims
- 2187US8364038B2Polarization multiplexed optical transmitter and method for controlling polarization multiplexed optical signalFUJITSU LTD·Filed 2010·Granted Jan 29, 2013·10 cites·13 claims
- 2285US8131152B2Optical add/drop multiplexerAKIYAMA YUICHI·Filed 2010·Granted Mar 6, 2012·5 cites·19 claims
- 2385US7603007B2Quadrature phase-shift keying modulator and phase shift amount controlling method for the sameFUJITSU LTD·Filed 2008·Granted Oct 13, 2009·11 cites·10 claims
- 2484US8145071B2Electrical-dispersion compensating apparatus, optical receiving apparatus, and optical receiving methodTANAKA TOSHIKI·Filed 2008·Granted Mar 27, 2012·10 cites·15 claims
- 2584US7933519B2Optical cross-connect using wavelength selective switchesFUJITSU LTD·Filed 2007·Granted Apr 26, 2011·9 cites·4 claims
- 2683US9014572B2Optical transmitter, control method for the same, and optical transmission systemAKIYAMA YUICHI·Filed 2012·Granted Apr 21, 2015·6 cites·19 claims
- 2783US8145072B2DQPSK optical receiverAKIYAMA YUICHI·Filed 2008·Granted Mar 27, 2012·8 cites·3 claims
- 2882US8582980B2Optical device and optical modulation methodNISHIHARA MASATO·Filed 2008·Granted Nov 12, 2013·9 cites·20 claims
- 2981US9654216B2Optical transmitter and waveform distortion correction methodFUJITSU LTD·Filed 2015·Granted May 16, 2017·4 cites·13 claims
- 3081US7711270B2Optical node and optical add/drop multiplexerFUJITSU LTD·Filed 2005·Granted May 4, 2010·8 cites·11 claims
- 3179US8121492B2Optical transmitting apparatusAKIYAMA YUICHI·Filed 2008·Granted Feb 21, 2012·7 cites·10 claims
- 3279US7035548B2Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling methodFUJITSU LTD·Filed 2004·Granted Apr 25, 2006·16 cites·15 claims
- 3378US9564975B2Optical transmission device, method of optical transmission, and non-transitory computer-readable mediumFUJITSU LTD·Filed 2013·Granted Feb 7, 2017·4 cites·8 claims
- 3477US7382979B2Wavelength dispersion compensation design method and a system thereofFUJITSU LTD·Filed 2005·Granted Jun 3, 2008·6 cites·11 claims
- 3576US7006770B2Optical receiving station, optical communication system, and dispersion controlling methodFUJITSU LTD·Filed 2001·Granted Feb 28, 2006·12 cites·15 claims
- 3676US6728491B1Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling methodFUJITSU LTD·Filed 1999·Granted Apr 27, 2004·44 cites·12 claims
- 3775US8731409B2Method for controlling polarization multiplexed optical signalFUJITSU LTD·Filed 2013·Granted May 20, 2014·3 cites·1 claims
- 3875US7418211B2Control apparatus and control method for optical modulatorFUJITSU LTD·Filed 2004·Granted Aug 26, 2008·12 cites·7 claims
- 3974US9350455B2Optical transmitter and bias control method of optical modulatorFUJITSU LTD·Filed 2014·Granted May 24, 2016·3 cites·12 claims
- 4073US10063322B2Optical transmitter and control method of optical transmitterFUJITSU LTD·Filed 2016·Granted Aug 28, 2018·2 cites·11 claims
- 4173US8165465B2Apparatus and method of controlling tap coefficient of transversal filer, optical receiver apparatus, and optical communication systemTANAKA TOSHIKI·Filed 2009·Granted Apr 24, 2012·4 cites·10 claims
- 4272US9887798B2Transmission apparatus, reception apparatus and modulation methodFUJITSU LTD·Filed 2016·Granted Feb 6, 2018·2 cites·15 claims
- 4372US6809849B2Control apparatus and control method for an optical methodFUJITSU LTD·Filed 2003·Granted Oct 26, 2004·12 cites·10 claims
- 4470US9240838B2Optical transmitter and method for controlling bias for optical modulatorFUJITSU LTD·Filed 2012·Granted Jan 19, 2016·2 cites·10 claims
- 4569US11165502B2Optical transmission device and optical transmission systemFUJITSU LTD·Filed 2019·Granted Nov 2, 2021·1 cites·12 claims
- 4669US8285152B2DQPSK optical receiverAKIYAMA YUICHI·Filed 2012·Granted Oct 9, 2012·2 cites·12 claims
- 4769US5982530AApparatus for driving an optical modulator to measure, and compensate for, dispersion in an optical transmission lineFUJITSU LTD·Filed 1999·Granted Nov 9, 1999·29 cites·11 claims
- 4868US9130680B2Optical transmitter and modulated optical signal generating methodFUJITSU LTD·Filed 2013·Granted Sep 8, 2015·2 cites·15 claims
- 4968US4614230AHeat exchangerMITSUBISHI ELECTRIC CORP·Filed 1984·Granted Sep 30, 1986·25 cites·15 claims
- 5067US7720383B2Optical transmission apparatus having OADM functionFUJITSU LTD·Filed 2007·Granted May 18, 2010·3 cites·5 claims
Showing the top 50 of 79 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →