Inventor · disambiguated record
Futoshi Izumi
Also filed as: IZUMI FUTOSHI
42 granted patents·7 pending applications·419 citations·filing 1998–2016
97Inventor score
Top patents by PatentIndex Score
49 records- 0196US6934479B2Wavelength division multiplexing optical communication system and wavelength division multiplexing optical communication methodFUJITSU LTD·Filed 2001·Granted Aug 23, 2005·74 cites·24 claims
- 0292US7376348B2Optical communication systemFUJITSU LTD·Filed 2007·Granted May 20, 2008·25 cites·9 claims
- 0386US9831944B2Probe generator, optical transmission apparatus and probe generating methodFUJITSU LTD·Filed 2016·Granted Nov 28, 2017·5 cites·8 claims
- 0486US8401386B2Optical transmission apparatusIZUMI FUTOSHI·Filed 2010·Granted Mar 19, 2013·9 cites·11 claims
- 0586US6532102B2Optical amplifierFUJITSU LTD·Filed 2001·Granted Mar 11, 2003·33 cites·12 claims
- 0682US7139484B2Signal transmission method in WDM transmission system, and WDM terminal, optical add-drop multiplexer node, and network element used in the same systemFUJITSU LTD·Filed 2002·Granted Nov 21, 2006·27 cites·47 claims
- 0780US6864968B2Method of measuring wavelength dispersion amount and optical transmission systemFUJITSU LTD·Filed 2002·Granted Mar 8, 2005·16 cites·27 claims
- 0878US9354483B2Optical limiter, optical logic circuit, comparator, digital converter, optical transmission apparatus and optical processing methodFUJITSU LTD·Filed 2014·Granted May 31, 2016·2 cites·13 claims
- 0978US7450856B2Dispersion compensating method and dispersion compensating apparatusFUJITSU LTD·Filed 2004·Granted Nov 11, 2008·20 cites·8 claims
- 1076US6466348B1Trunk apparatus of a wavelength-division-multiplexing communication system for controlling a gain of an optical amplifier provided thereinFUJITSU LTD·Filed 1998·Granted Oct 15, 2002·54 cites·12 claims
- 1176US6449070B1Optical transmission device and wavelength-multiplexed optical transmission systemFUJITSU LTD·Filed 1999·Granted Sep 10, 2002·44 cites·25 claims
- 1275US8818189B2Transmission-path-type specifying apparatus and transmission-path-type specifying methodIZUMI FUTOSHI·Filed 2008·Granted Aug 26, 2014·5 cites·14 claims
- 1373US7139347B2Parallel signal automatic phase adjusting circuitFUJITSU LTD·Filed 2001·Granted Nov 21, 2006·19 cites·21 claims
- 1472US8958702B2System and method for reducing interference of a polarization multiplexed signalIZUMI FUTOSHI·Filed 2011·Granted Feb 17, 2015·3 cites·14 claims
- 1571US8682157B2Optical communication system, optical receiving terminal, and optical signal fault detection methodIZUMI FUTOSHI·Filed 2010·Granted Mar 25, 2014·3 cites·11 claims
- 1671US8538268B2Optical signal demultiplexing device and optical signal demultiplexing methodIZUMI FUTOSHI·Filed 2011·Granted Sep 17, 2013·2 cites·6 claims
- 1771US7853151B2Optical communication system, method, and optical transmitting stationFUJITSU LTD·Filed 2005·Granted Dec 14, 2010·4 cites·13 claims
- 1870US6275330B1Apparatus and method for controlling a wavelength-multiplex optical amplifierFUJITSU LTD·Filed 1999·Granted Aug 14, 2001·33 cites·16 claims
- 1969US7853146B2Optical transmission apparatusFUJITSU LTD·Filed 2006·Granted Dec 14, 2010·4 cites·5 claims
- 2069US6674567B2Raman excitation control method and optical transmission system using the sameFUJITSU LTD·Filed 2001·Granted Jan 6, 2004·9 cites·18 claims
- 2167US8265063B2Transmission systemIZUMI FUTOSHI·Filed 2006·Granted Sep 11, 2012·3 cites·5 claims
- 2267US7812618B2Printed circuit board, and backplane data transmission methodFUJITSU LTD·Filed 2009·Granted Oct 12, 2010·2 cites·5 claims
- 2365US9866344B2Frequency conversion device, wavelength multiplex device and frequency conversion methodFUJITSU LTD·Filed 2015·Granted Jan 9, 2018·1 cites·15 claims
- 2464US7209661B2Wavelength multiplexing method and an apparatus thereofFUJITSU LTD·Filed 2003·Granted Apr 24, 2007·8 cites·11 claims
- 2562US9490896B2Optical transceiver, optical transmission system, and light source output monitoring methodFUJITSU LTD·Filed 2015·Granted Nov 8, 2016·1 cites·17 claims
- 2662US7974799B2Backboard transmission method, backboard transmission apparatus, and substrate unitFUJITSU LTD·Filed 2006·Granted Jul 5, 2011·2 cites·27 claims
- 2762US7623791B2Optical signal multiplexing device and optical signal multiplexing methodFUJITSU LTD·Filed 2008·Granted Nov 24, 2009·2 cites·10 claims
- 2861US9735916B2Optical receiver, optical signal processing method, and optical transmission systemFUJITSU LTD·Filed 2014·Granted Aug 15, 2017·1 cites·16 claims
- 2960US7242865B2Optical communication systemFUJITSU LTD·Filed 2004·Granted Jul 10, 2007·5 cites·12 claims
- 3058US8515288B2Optical signal transmission control apparatus and optical signal transmission control methodIZUMI FUTOSHI·Filed 2009·Granted Aug 20, 2013·1 cites·13 claims
- 3155US10268101B2Optical logic circuitFUJITSU LTD·Filed 2015·Granted Apr 23, 2019·0 cites·10 claims
- 3252US7583091B2Printed circuit board, and backplane data transmission methodFUJITSU LTD·Filed 2007·Granted Sep 1, 2009·0 cites·5 claims
- 3350US7920568B2Frame transmission apparatusFUJITSU LTD·Filed 2008·Granted Apr 5, 2011·0 cites·13 claims
- 3450US2008285976A1Optical signal demultiplexing device and optical signal demultiplexing methodFUJITSU LTD·Filed 2008·Application pending·0 cites
- 3549US7627207B2Dispersion compensating method and dispersion compensating apparatusFUJITSU LTD·Filed 2007·Granted Dec 1, 2009·0 cites·16 claims
- 3649US7505685B2Wavelength-division multiplex communication system and apparatusFUJITSU LTD·Filed 2002·Granted Mar 17, 2009·2 cites·23 claims
- 3748US9306362B2Optical branching device, optical amplification apparatus, and optical amplification methodFUJITSU LTD·Filed 2015·Granted Apr 5, 2016·0 cites·11 claims
- 3847US7313327B2Switching control device for wavelength-division multiplexing optical signalFUJITSU LTD·Filed 2004·Granted Dec 25, 2007·0 cites·33 claims
- 3946US8031395B2Optical transmission system using Raman amplifier and controlling method thereofFUJITSU LTD·Filed 2008·Granted Oct 4, 2011·0 cites·9 claims
- 4046US7623794B2Wavelength division-multiplex systemFUJITSU LTD·Filed 2004·Granted Nov 24, 2009·0 cites·12 claims
- 4146US2005057794A1Raman excitation control method and optical transmission system using the sameFUJITSU LTD·Filed 2003·Application pending·0 cites
- 4246US2009136239A1Optical Signal Transmission Control Apparatus and Optical Signal Transmission Control MethodIZUMI FUTOSHI·Filed 2005·Application pending·0 cites
- 4346US2006210220A1Dispersion compensating method and dispersion compensating apparatusFUJITSU LTD·Filed 2006·Application pending·0 cites
- 4444US2008002986A1Optical spatial communication method, optical transmission apparatus, optical reception apparatus, and optical spatial communication systemFUJITSU LTD·Filed 2007·Application pending·0 cites
- 4543US7725040B2Wavelength division multiplexing transmission deviceFUJITSU LTD·Filed 2005·Granted May 25, 2010·0 cites·8 claims
- 4642US7623787B2Wavelength division multiplexing transmission apparatus using a multiple wavelength light sourceFUJITSU LTD·Filed 2005·Granted Nov 24, 2009·0 cites·8 claims
- 4742US2003170028A1Optical transmitter, optical repeater, optical receiver and optical transmission methodFUJITSU LTD·Filed 2003·Application pending·0 cites
- 4838US8279518B2Optical amplifierIZUMI FUTOSHI·Filed 2010·Granted Oct 2, 2012·0 cites·15 claims
- 4933US2006098686A1Frame transmitting apparatus and frame receiving apparatusTAKAKUWA MAKOTO·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →