Inventor · disambiguated record
Masakazu Shigehara
Also filed as: SHIGEHARA MASAKAZU
49 granted patents·10 pending applications·794 citations·filing 1995–2022
98Inventor score
Files withSUMITOMO ELECTRIC INDUSTRIES50SUMIDEN HIGH PREC CO LTD2SAKABE ITARU1SHIBATA MASAHIRO1SHIGEHARA MASAKAZU1
Top patents by PatentIndex Score
59 records- 0195US8821036B2Optical module and optical systemSHIGEHARA MASAKAZU·Filed 2011·Granted Sep 2, 2014·55 cites·7 claims
- 0289US6067392AOptical fiber diffraction grating, a method of fabricating thereof and a laser light sourceSUMITOMO ELECTRIC INDUSTRIES·Filed 1996·Granted May 23, 2000·97 cites·23 claims
- 0387US6788874B1Optical componentSUMITOMO ELECTRIC INDUSTRIES·Filed 2000·Granted Sep 7, 2004·34 cites·3 claims
- 0487US6490078B2Optical fiber for optical amplifier, optical fiber amplifier and optical fiber laserSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted Dec 3, 2002·26 cites·12 claims
- 0585US6771358B1Branch line monitoring system and branch line monitoring methodSUMITOMO ELECTRIC INDUSTRIES·Filed 2000·Granted Aug 3, 2004·28 cites·15 claims
- 0684US6842566B2Optical fiber with built-in grating and optical fiber for forming grating thereinSUMITOMO ELECTRIC INDUSTRIES·Filed 2002·Granted Jan 11, 2005·35 cites·9 claims
- 0783US5771250ALaser light source apparatus, OTDR apparatus, and optical communication line inspection systemSUMITOMO ELECTRIC INDUST LTD·Filed 1996·Granted Jun 23, 1998·68 cites·72 claims
- 0881US7019904B2Diffraction grating element, production method of diffraction grating element, and method of designing diffraction grating elementSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Granted Mar 28, 2006·18 cites·17 claims
- 0980US5859945AArray type light emitting element module and manufacturing method thereforSUMITOMO ELECTRIC INDUSTRIES·Filed 1996·Granted Jan 12, 1999·54 cites·11 claims
- 1079US6487340B2Optical fiber grating element, production method, and optical fiber filterSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted Nov 26, 2002·21 cites·11 claims
- 1177US5993073ASemiconductor laser moduleSUMITOMO ELECTRIC INDUSTRIES·Filed 1998·Granted Nov 30, 1999·50 cites·12 claims
- 1274US9176295B2Stranded optical cable with connectorsSAKABE ITARU·Filed 2011·Granted Nov 3, 2015·4 cites·7 claims
- 1374US7184214B2Diffraction grating element, production method of diffraction grating element, and method of designing diffraction grating elementSUMITOMO ELECTRIC INDUSTRIES·Filed 2005·Granted Feb 27, 2007·5 cites·17 claims
- 1474US7085054B2Diffraction grating elementSUMITOMO ELECTRIC INDUSTRIES·Filed 2005·Granted Aug 1, 2006·5 cites·12 claims
- 1573US6917471B2Diffraction grating elementSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Granted Jul 12, 2005·12 cites·47 claims
- 1671US7203399B2Optical fiber and fiber grating type filter including the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2003·Granted Apr 10, 2007·13 cites·4 claims
- 1771US6522810B2Optical loss filterSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted Feb 18, 2003·12 cites·11 claims
- 1870US6867907B2Pumping light source unit, raman amplifier, and optical transmission systemSUMITOMO ELECTRIC INDUSTRIES·Filed 2002·Granted Mar 15, 2005·9 cites·52 claims
- 1970US6738183B2Optical filter functioning as both a gain equalizer and noise-light blocking filterSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted May 18, 2004·9 cites·8 claims
- 2069US6892003B2Variable dispersion compensator and optical transmission systemSUMITOMO ELECTRIC INDUSTRIES·Filed 2002·Granted May 10, 2005·11 cites·13 claims
- 2169US5790726AOptical waveguide and process for producing itSUMITOMO ELECTRIC INDUSTRIES·Filed 1997·Granted Aug 4, 1998·29 cites·11 claims
- 2268US5627933AOptical waveguide and process for producing itSUMITOMO ELECTRIC INDUSTRIES·Filed 1995·Granted May 6, 1997·28 cites·9 claims
- 2366US6337937B1Optical filter and method of making the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 1999·Granted Jan 8, 2002·29 cites·8 claims
- 2465US6665472B2Optical filter having cascaded long-period gratingsSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted Dec 16, 2003·9 cites·4 claims
- 2564US7502167B2Diffraction grating element, production method of diffraction grating element, and method of designing diffraction grating elementSUMITOMO ELECTRIC INDUSTRIES·Filed 2007·Granted Mar 10, 2009·2 cites·12 claims
- 2664US6580854B1Optical waveguide grating and method of making the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2000·Granted Jun 17, 2003·9 cites·2 claims
- 2761US6825981B2Optical signal processorSUMITOMO ELECTRIC INDUSTRIES·Filed 2003·Granted Nov 30, 2004·7 cites·14 claims
- 2861US6317538B1Optical waveguide device and optical device having long-period gratingSUMITOMO ELECTRIC INDUSTRIES·Filed 1998·Granted Nov 13, 2001·23 cites·20 claims
- 2960US6965475B2Optical component, optical device and optical communications systemSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Granted Nov 15, 2005·6 cites·14 claims
- 3059US10962709B2Optical fiber and optical fiber gratingSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Mar 30, 2021·0 cites·8 claims
- 3159US7712979B2Optical adapterSUMIDEN HIGH PREC CO LTD·Filed 2007·Granted May 11, 2010·3 cites·4 claims
- 3259US6766080B2Optical waveguide type defraction grating device and a method of manufacturing thereofSUMITOMO ELECTRIC INDUSTRIES·Filed 2002·Granted Jul 20, 2004·6 cites·18 claims
- 3359US6563984B1Long-period grating deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2000·Granted May 13, 2003·6 cites·2 claims
- 3457US7521660B2Optical signal processor and optical signal processing method for processing optical signals in optical communications systemsSUMITOMO ELECTRIC INDUSTRIES·Filed 2005·Granted Apr 21, 2009·2 cites·71 claims
- 3557US6823106B2Optical multiplexer/demultiplexer and adjustment method thereofSUMITOMO ELECTRIC INDUSTRIES·Filed 2002·Granted Nov 23, 2004·5 cites·20 claims
- 3656US6144784AOptical input/output module and light-reflecting deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 1998·Granted Nov 7, 2000·19 cites·17 claims
- 3754US6804437B2Diffraction grating device manufacturing method, diffraction grating device manufacturing apparatus, and diffraction grating deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2003·Granted Oct 12, 2004·4 cites·7 claims
- 3852US6415078B1Laser light source and manufacturing method thereforSUMITOMO ELECTRIC INDUSTRIES·Filed 1996·Granted Jul 2, 2002·16 cites·19 claims
- 3952US2024103235A1Optical connectorSUMITOMO ELECTRIC OPTIFRONTIER CO LTD·Filed 2022·Application pending·0 cites
- 4051US2022196908A1Optical fiber and optical fiber filterSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Application pending·0 cites
- 4150US6483955B2Diffraction grating deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted Nov 19, 2002·3 cites·5 claims
- 4249US7110636B2Optical device control apparatus and optical device control methodSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Granted Sep 19, 2006·2 cites·18 claims
- 4348US7079311B2Optical amplifier and optical communication system including the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Granted Jul 18, 2006·0 cites·4 claims
- 4446US11555967B2Fiber connection structure provided with optical connector, module, and assemblySUMITOMO ELECTRIC INDUSTRIES·Filed 2018·Granted Jan 17, 2023·0 cites·34 claims
- 4546US6819482B2Optical amplifier and optical communication system including the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2002·Granted Nov 16, 2004·0 cites·16 claims
- 4645US2006262305A1Diffraction grating elementSUMITOMO ELECTRIC INDUSTRIES·Filed 2006·Application pending·0 cites
- 4744US2008145005A1Optical communication module and optical sub-assemblySHIBATA MASAHIRO·Filed 2007·Application pending·0 cites
- 4843US6141466AWavelength-variable light source and OTDR apparatusSUMITOMO ELECTRIC INDUSTRIES·Filed 1998·Granted Oct 31, 2000·10 cites·14 claims
- 4942US6952511B2Gain equalizer and optical amplification apparatusSUMITOMO ELECTRIC INDUSTRIES·Filed 2003·Granted Oct 4, 2005·0 cites·8 claims
- 5041US2004201892A1Diffraction grating element, optical module and optical communications systemSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Application pending·0 cites
Showing the top 50 of 59 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →