Inventor · disambiguated record
Takemi Hasegawa
Also filed as: HASEGAWA TAKEMI
47 granted patents·33 pending applications·477 citations·filing 2000–2025
98Inventor score
Top patents by PatentIndex Score
80 records- 0198US7043127B2Microstructured optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2005·Granted May 9, 2006·43 cites·6 claims
- 0296US6766088B2Optical fiber and method for making the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted Jul 20, 2004·51 cites·8 claims
- 0395US6901197B2Microstructured optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2003·Granted May 31, 2005·79 cites·26 claims
- 0494US11754466B2Mode-dependent loss measurement device and mode-dependent loss measuring methodSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Sep 12, 2023·2 cites·13 claims
- 0593US6526209B1Optical fiber having improved optics and structureSUMITOMO ELECTRIC INDUSTRIES·Filed 2000·Granted Feb 25, 2003·29 cites·16 claims
- 0690US11099322B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Aug 24, 2021·2 cites·15 claims
- 0788US11841529B2Optical fiber and optical cableSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Dec 12, 2023·2 cites·12 claims
- 0888US7440665B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2005·Granted Oct 21, 2008·21 cites·5 claims
- 0986US6606440B2Microstructured optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted Aug 12, 2003·32 cites·12 claims
- 1085US11366267B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Jun 21, 2022·1 cites·16 claims
- 1185US10585234B2Coupled multicore optical fiber and optical transmission system including sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2018·Granted Mar 10, 2020·4 cites·8 claims
- 1285US6868213B2Optical fiber and production method thereforSUMITOMO ELECTRIC INDUSTRIES·Filed 2002·Granted Mar 15, 2005·13 cites·14 claims
- 1385US6636677B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted Oct 21, 2003·31 cites·14 claims
- 1483US6571045B2Microstructured optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted May 27, 2003·26 cites·12 claims
- 1581US6850679B2Microstructured optical fiber and method of makingSUMITOMO ELECTRIC INDUSTRIES·Filed 2003·Granted Feb 1, 2005·10 cites·15 claims
- 1679US7777891B2Elasticity and viscosity measuring apparatusSUMITOMO ELECTRIC INDUSTRIES·Filed 2006·Granted Aug 17, 2010·20 cites·9 claims
- 1778US8654320B2Beam Path Monitoring Device and Beam Path Monitoring SystemHASEGAWA TAKEMI·Filed 2009·Granted Feb 18, 2014·9 cites·7 claims
- 1878US6915053B2Microstructured optical fiber and optical moduleSUMITOMO ELECTRIC INDUSTRIES·Filed 2003·Granted Jul 5, 2005·20 cites·13 claims
- 1978US2025052949A1Optical fiber and method for producing optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2024·Application pending·0 cites
- 2076US11156529B2Nonlinearity measuring method and nonlinearity measuring deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2019·Granted Oct 26, 2021·1 cites·5 claims
- 2175US7484387B2Method of making a microstructured optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Granted Feb 3, 2009·6 cites·7 claims
- 2272US6922503B2Optical system moduleSUMITOMO ELECTRIC INDUSTRIES·Filed 2003·Granted Jul 26, 2005·13 cites·14 claims
- 2372US6859598B2Microstructured optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted Feb 22, 2005·14 cites·9 claims
- 2470US7153034B2Method of constructing an optical transmission line and an optical transmission lineSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Granted Dec 26, 2006·11 cites·8 claims
- 2568US12164145B2Optical fiber and method for producing optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Dec 10, 2024·0 cites·9 claims
- 2668US8325330B2Optical fibre circuit monitoring system and monitoring device included in this systemHASEGAWA TAKEMI·Filed 2009·Granted Dec 4, 2012·5 cites·11 claims
- 2767US10908353B2Optical fiber and slanted fiber gratingSUMITOMO ELECTRIC INDUSTRIES·Filed 2018·Granted Feb 2, 2021·1 cites·6 claims
- 2867US6661954B2Optical transmission line including a connected part of optical fibers and connecting methodSUMITOMO ELECTRIC INDUSTRIES·Filed 2002·Granted Dec 9, 2003·10 cites·10 claims
- 2967US6608955B2Optical fiber and laser machining apparatusSUMITOMO ELECTRIC INDUSTRIES·Filed 2002·Granted Aug 19, 2003·11 cites·9 claims
- 3066US11467340B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Oct 11, 2022·0 cites·8 claims
- 3164US12498518B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Dec 16, 2025·0 cites·10 claims
- 3264US2025327969A1Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2023·Application pending·0 cites
- 3364US2024402417A1Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2022·Application pending·0 cites
- 3464US2025382221A1Glass material and optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2023·Application pending·0 cites
- 3563US2024375991A1Method for producing optical fiber, and optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2022·Application pending·0 cites
- 3661US11137542B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Oct 5, 2021·0 cites·16 claims
- 3761US7340137B2Optical fiber and optical moduleSUMITOMO ELECTRIC INDUSTRIES·Filed 2006·Granted Mar 4, 2008·2 cites·10 claims
- 3859US6718105B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted Apr 6, 2004·6 cites·5 claims
- 3959US2024025789A1Glass rod manufacturing device and glass rod manufacturing methodSUMITOMO ELECTRIC INDUSTRIES·Filed 2022·Application pending·0 cites
- 4058US11774672B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Oct 3, 2023·0 cites·15 claims
- 4158US9128249B2Optical probe and optical measuring methodSUMITOMO ELECTRIC INDUSTRIES·Filed 2013·Granted Sep 8, 2015·1 cites·5 claims
- 4258US2025361174A1Glass material and optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2023·Application pending·0 cites
- 4357US2025258333A1Multicore optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2025·Application pending·0 cites
- 4455US8483531B2Optical fiberHASEGAWA TAKEMI·Filed 2009·Granted Jul 9, 2013·0 cites·7 claims
- 4554US12449589B2Multicore optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Oct 21, 2025·0 cites·1 claims
- 4654US2009209865A1Optical analyzerSUMITOMO ELECTRIC INDUSTRIES·Filed 2007·Application pending·0 cites
- 4753US8546722B2Laser processing apparatus and processing method employed thereinYAMADA EIICHIRO·Filed 2009·Granted Oct 1, 2013·1 cites·19 claims
- 4851US2024275117A1Optical amplification transmission lineSUMITOMO ELECTRIC INDUSTRIES·Filed 2023·Application pending·0 cites
- 4951US2022196908A1Optical fiber and optical fiber filterSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Application pending·0 cites
- 5050US12204140B2Gain flattening filter, and method for manufacturing gain flattening filterSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Jan 21, 2025·0 cites·13 claims
Showing the top 50 of 80 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →