Inventor · disambiguated record
Kazutaka Nara
Also filed as: NARA KAZUTAKA
64 granted patents·32 pending applications·603 citations·filing 2000–2022
99Inventor score
Top patents by PatentIndex Score
96 records- 0194US6490395B1Arrayed waveguide grating and method for compensating optical transmitting center wavelength of light traveling through the sameFURUKAWA ELECTRIC CO LTD·Filed 2000·Granted Dec 3, 2002·70 cites·21 claims
- 0291US7480091B2Delay-line demodulator and method of adjusting a phase shift in the demodulatorFURUKAWA ELECTRIC CO LTD·Filed 2008·Granted Jan 20, 2009·14 cites·11 claims
- 0390US8526102B2PLC-type demodulator and optical transmission systemINOUE TAKASHI·Filed 2012·Granted Sep 3, 2013·12 cites·15 claims
- 0490US8401351B290-degree hybridINOUE TAKASHI·Filed 2012·Granted Mar 19, 2013·12 cites·16 claims
- 0590US7539368B2Arrayed waveguide gratingFURUKAWA ELECTRIC CO LTD·Filed 2008·Granted May 26, 2009·22 cites·9 claims
- 0689US7961991B2Delay demodulation devicesFURUKAWA ELECTRIC CO LTD·Filed 2009·Granted Jun 14, 2011·11 cites·11 claims
- 0788US7133587B2Dispersion compensator, method for manufacturing the same, and method for compensating wavelength dispersionFURUKAWA ELECTRIC CO LTD·Filed 2006·Granted Nov 7, 2006·9 cites·52 claims
- 0887US8837869B2SOA-PLC hybrid integrated polarization diversity circuit and method for manufacturing the sameFURUKAWA ELECTRIC CO LTD·Filed 2013·Granted Sep 16, 2014·9 cites·7 claims
- 0986US9417388B2Spot-size conversion optical waveguideFURUKAWA ELECTRIC CO LTD·Filed 2015·Granted Aug 16, 2016·7 cites·11 claims
- 1086US7649678B2Delay-line demodulatorFURUKAWA ELECTRIC CO LTD·Filed 2008·Granted Jan 19, 2010·10 cites·4 claims
- 1185US7884996B2Delay-line demodulatorFURUKAWA ELECTRIC CO LTD·Filed 2009·Granted Feb 8, 2011·9 cites·20 claims
- 1285US7561765B2Optical integrated circuit and optical integrated circuit moduleFURUKAWA ELECTRIC CO LTD·Filed 2008·Granted Jul 14, 2009·14 cites·6 claims
- 1385US6563986B2Arrayed waveguide gratingFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted May 13, 2003·32 cites·16 claims
- 1484US8457459B2Arrayed-waveguide-grating-type optical multiplexer/demultiplexerHASEGAWA JUNICHI·Filed 2010·Granted Jun 4, 2013·7 cites·10 claims
- 1583US6456763B2Arrayed waveguide grating type optical multiplexer/demultiplexer and a method of manufacturing the sameFURUKAWA ELECTRIC CO LTD·Filed 2000·Granted Sep 24, 2002·27 cites·22 claims
- 1682US8023781B2Broadband wavelength multiplexing and demultiplexing filter and optical splitter with optical signal multiplexing and demultiplexing functionFURUKAWA ELECTRIC CO LTD·Filed 2011·Granted Sep 20, 2011·6 cites·8 claims
- 1781US7492983B2Optical circuit deviceFURUKAWA ELECTRIC CO LTD·Filed 2005·Granted Feb 17, 2009·12 cites·11 claims
- 1880US7146079B2Dynamic gain equalizerFURUKAWA ELECTRIC CO LTD·Filed 2005·Granted Dec 5, 2006·7 cites·18 claims
- 1979US7978401B2Delay demodulation devicesFURUKAWA ELECTRIC CO LTD·Filed 2009·Granted Jul 12, 2011·7 cites·7 claims
- 2078US8422118B2PLC-type delay demodulation circuitKAWASHIMA HIROSHI·Filed 2011·Granted Apr 16, 2013·2 cites·13 claims
- 2178US6567587B2Dispersion compensator and dispersion-compensating module employing the sameFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted May 20, 2003·19 cites·6 claims
- 2277US6870979B2Optical circuit, method for manufacturing optical circuit, optical circuit device and method for controlling optical circuit deviceFURUKAWA ELECTRIC CO LTD·Filed 2003·Granted Mar 22, 2005·17 cites·34 claims
- 2377US6442314B2Arrayed waveguide gratingFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted Aug 27, 2002·18 cites·4 claims
- 2476US7813032B2Methods to control phase shifts of delay demodulation devicesFURUKAWA ELECTRIC CO LTD·Filed 2009·Granted Oct 12, 2010·4 cites·4 claims
- 2576US6671433B2Arrayed waveguide grating type optical multiplexer/demultiplexerFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted Dec 30, 2003·16 cites·6 claims
- 2676US6668116B2Arrayed waveguide grating type optical multiplexer/demultiplexerFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted Dec 23, 2003·20 cites·1 claims
- 2776US6501896B2Optical waveguide circuitFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted Dec 31, 2002·16 cites·4 claims
- 2875US8538213B2SSC chip, fiber array attached with SSC, PLC module attached with SSC and method for manufacturing SSCUCHIDA YASUYOSHI·Filed 2009·Granted Sep 17, 2013·10 cites·16 claims
- 2974US8477409B2PLC-type delay demodulation circuit and PLC-type optical interferometerKAWASHIMA HIROSHI·Filed 2012·Granted Jul 2, 2013·3 cites·16 claims
- 3073US7469079B2Broadband wavelength multiplexing and demultiplexing filter and optical splitter with optical signal multiplexing and demultiplexing functionFURUKAWA ELECTRIC CO LTD·Filed 2005·Granted Dec 23, 2008·6 cites·18 claims
- 3173US6728435B2Arrayed waveguide grating type optical multiplexer/demultiplexer and optical waveguide circuitFURUKAWA ELECTRIC CO LTD·Filed 2002·Granted Apr 27, 2004·15 cites·18 claims
- 3272US7555175B2Arrayed waveguide grating optical multiplexer/demultiplexerFURUKAWA ELECTRIC CO LTD·Filed 2007·Granted Jun 30, 2009·5 cites·8 claims
- 3371US6735364B2Arrayed waveguide grating optical multiplexer/demultiplexer and method for manufacturing the sameFURUKAWA ELECTRIC CO LTD·Filed 2002·Granted May 11, 2004·13 cites·50 claims
- 3471US6501882B2Arrayed waveguide grating type optical multiplexer/demultiplexerFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted Dec 31, 2002·13 cites·29 claims
- 3570US7542640B2Arrayed waveguide grating optical multiplexer/demultiplexerFURUKAWA ELECTRIC CO LTD·Filed 2008·Granted Jun 2, 2009·5 cites·2 claims
- 3669US6836591B2Arrayed waveguide grating type optical multiplexer/demultiplexer and optical waveguide circuitFURUKAWA ELECTRIC CO LTD·Filed 2000·Granted Dec 28, 2004·11 cites·45 claims
- 3769US6539158B2Optical waveguide circuitFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted Mar 25, 2003·11 cites·2 claims
- 3868US8441717B2PLC-type delay demodulation circuitKAWASHIMA HIROSHI·Filed 2011·Granted May 14, 2013·2 cites·15 claims
- 3968US7072545B2Dispersion compensator, method for manufacturing the same, and method for compensating wavelength dispersionFURUKAWA ELECTRIC CO LTD·Filed 2003·Granted Jul 4, 2006·9 cites·4 claims
- 4068US6763164B2Method for manufacturing a planar lightwave circuit, and planar waveguide circuitFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted Jul 13, 2004·11 cites·4 claims
- 4167US7233714B2Planar optical waveguide circuit type variable attenuatorFURUKAWA ELECTRIC CO LTD·Filed 2006·Granted Jun 19, 2007·4 cites·22 claims
- 4267US6768832B2Arrayed waveguide grating optical multiplexer/demultiplexer and method for manufacturing the sameFURUKAWA ELECTRIC CO LTD·Filed 2002·Granted Jul 27, 2004·10 cites·35 claims
- 4366US6816651B2Arrayed waveguide grating optical multiplexer/demultiplexer and method for manufacturing the sameFURUKAWA ELECTRIC CO LTD·Filed 2003·Granted Nov 9, 2004·8 cites·23 claims
- 4465US7885493B2Broadband wavelength multiplexing and demultiplexing filter and optical splitter with optical signal multiplexing and demultiplexing functionFURUKAWA ELECTRIC CO LTD·Filed 2008·Granted Feb 8, 2011·3 cites·6 claims
- 4565US6591044B2Optical waveguide circuit moduleFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted Jul 8, 2003·9 cites·5 claims
- 4665US6504983B1Optical waveguide and method for fabricating the sameFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted Jan 7, 2003·9 cites·3 claims
- 4764US8068736B2Tunable dispersion compensatorKAWASHIMA HIROSHI·Filed 2008·Granted Nov 29, 2011·3 cites·12 claims
- 4864US6631235B1Planar lightwave circuit platform and method for manufacturing the sameFURUKAWA ELECTRIC CO LTD·Filed 2000·Granted Oct 7, 2003·8 cites·8 claims
- 4963US9354395B2Optical waveguide element and method of producing the sameFURUKAWA ELECTRIC CO LTD·Filed 2014·Granted May 31, 2016·1 cites·8 claims
- 5062US9488783B2Switch apparatusFURUKAWA ELECTRIC CO LTD·Filed 2015·Granted Nov 8, 2016·1 cites·12 claims
Showing the top 50 of 96 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →