Inventor · disambiguated record
Hidehiko Takara
Also filed as: TAKARA HIDEHIKO
32 granted patents·3 pending applications·719 citations·filing 1992–2016
97Inventor score
Files withNIPPON TELEGRAPH & TELEPHONE24ANRITSU CORP4JINNO MASAHIKO2ASOBE MASAKI1FURUKAWA ELECTRIC CO LTD1
Top patents by PatentIndex Score
35 records- 0193US9065243B2Optical amplifierASOBE MASAKI·Filed 2012·Granted Jun 23, 2015·62 cites·29 claims
- 0293US5999548AWhite optical pulse source and applicationsNIPPON TELEGRAPH & TELEPHONE·Filed 1998·Granted Dec 7, 1999·113 cites·61 claims
- 0386US8964581B2Bandwidth variable communication method, bandwidth variable communication apparatus, transmission bandwidth determination apparatus, transmission bandwidth determination method, node apparatus, communication path setting system, communication path settingTAKARA HIDEHIKO·Filed 2010·Granted Feb 24, 2015·13 cites·25 claims
- 0486US5646774AMode-locked laser stabilizing method and apparatusNIPPON TELEGRAPH & TELEPHONE·Filed 1996·Granted Jul 8, 1997·65 cites·8 claims
- 0582US10615868B2Communication system and fault detection methodNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Granted Apr 7, 2020·4 cites·9 claims
- 0682US10511381B2Communication system and fault location specifying methodNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Granted Dec 17, 2019·4 cites·4 claims
- 0781US6023360AMultiple-channel all-optical TDM-WDM converter and multiple-channel all-optical TDM demultiplexerNIPPON TELEGRAPH & TELEPHONE·Filed 1997·Granted Feb 8, 2000·74 cites·10 claims
- 0881US5267256AWavelength division multiplex type mode - lock laser deviceNIPPON TELEGRAPH & TELEPHONE·Filed 1992·Granted Nov 30, 1993·78 cites·14 claims
- 0979US5960146AOptical fiber and light source apparatusSUMITOMO ELECTRIC INDUSTRIES·Filed 1997·Granted Sep 28, 1999·50 cites·19 claims
- 1076US7684697B2Optical signal quality monitoring circuit and optical signal quality monitoring methodNIPPON TELEGRAPH & TELEPHONE·Filed 2005·Granted Mar 23, 2010·6 cites·20 claims
- 1173US6671444B1Optical fiberFURUKAWA ELECTRIC CO LTD·Filed 2000·Granted Dec 30, 2003·15 cites·7 claims
- 1271US6587242B1Optical transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 1999·Granted Jul 1, 2003·48 cites·29 claims
- 1371US6154309AComplementary optical sampling waveform measuring apparatus and polarization beam splitter which can be assembled thereinANRITSU CORP·Filed 1998·Granted Nov 28, 2000·38 cites·12 claims
- 1470US6396601B1System for monitoring quality of optical signals having different bit ratesNIPPON TELEGRAPH & TELEPHONE·Filed 1998·Granted May 28, 2002·42 cites·20 claims
- 1569US7200328B2Method and system for determining origin of optical signal quality degradationNIPPON TELEGRAPH & TELEPHONE·Filed 2002·Granted Apr 3, 2007·12 cites·30 claims
- 1666US10527781B2Communication system and connectorNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Granted Jan 7, 2020·1 cites·19 claims
- 1766US5995228AWavelength dispersion measuring apparatus and polarization dispersion measuring apparatusANRITSU CORP·Filed 1999·Granted Nov 30, 1999·33 cites·11 claims
- 1863US9326049B2Multi-flow optical transceiver, multi-flow optical transponder and multi-flow optical nodeYONENAGA KAZUSHIGE·Filed 2012·Granted Apr 26, 2016·2 cites·9 claims
- 1962US7668459B2Dispersion monitoring method and apparatus and dispersion slope temperature dependency compensation method and apparatusNIPPON TELEGRAPH & TELEPHONE·Filed 2003·Granted Feb 23, 2010·7 cites·18 claims
- 2061US7190752B2Data signal quality evaluation method and apparatus using high speed samplingNIPPON TELEGRAPH & TELEPHONE·Filed 2003·Granted Mar 13, 2007·7 cites·49 claims
- 2159US7024122B2Ultrahigh-speed clock extraction circuitNIPPON TELEGRAPH & TELEPHONE·Filed 2002·Granted Apr 4, 2006·6 cites·13 claims
- 2259US5590143AMultiple-frequency-modulation type mode-locked laser deviceNIPPON TELEGRAPH & TELEPHONE·Filed 1995·Granted Dec 31, 1996·23 cites·11 claims
- 2358US9479282B2Optical communication apparatus, optical route switching apparatus and networkJINNO MASAHIKO·Filed 2012·Granted Oct 25, 2016·1 cites·6 claims
- 2457US6720548B2Optical sampling waveform measuring apparatus aiming at achieving wider bandANRITSU CORP·Filed 2002·Granted Apr 13, 2004·6 cites·3 claims
- 2556US7079765B2Optical wavelength division multiplex signal monitoring apparatusNIPPON TELEGRAPH & TELEPHONE·Filed 2002·Granted Jul 18, 2006·4 cites·37 claims
- 2653US6842565B2Optical modulation/multiplexing circuitNIPPON TELEGRAPH & TELEPHONE·Filed 2003·Granted Jan 11, 2005·2 cites·6 claims
- 2752US7151897B2Optical clock phase-locked loop circuitNIPPON TELEGRAPH & TELEPHONE·Filed 2002·Granted Dec 19, 2006·2 cites·12 claims
- 2849US8526438B2Bandwidth variable communication apparatus and bandwidth variable communication methodJINNO MASAHIKO·Filed 2009·Granted Sep 3, 2013·1 cites·30 claims
- 2947US9762982B2Multi-flow optical transceiver, multi-flow optical transponder and multi-flow optical nodeNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Granted Sep 12, 2017·0 cites·18 claims
- 3046US11108208B2Optical amplification system and optical amplification methodNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Granted Aug 31, 2021·0 cites·8 claims
- 3143US2004028089A1Method and apparatus for channel extraction of optical time-division-multiplexing signalNIPPON TELEGRAPH & TELEPHONE·Filed 2003·Application pending·0 cites
- 3241US10686520B2Transmission quality estimation system, transmission quality estimation device, and transmission quality estimation methodNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Granted Jun 16, 2020·0 cites·17 claims
- 3336US6697395B2Sum frequency light generation method and sum frequency light generation apparatus adapatble for wide-band wavelength conversionANRITSU CORP·Filed 2002·Granted Feb 24, 2004·0 cites·9 claims
- 3435US2018375579A1Communication system and connectorNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Application pending·0 cites
- 3535US2018343067A1Node and optical power supply systemNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →