Inventor
HASEGAWA TAKEMI
JP48 patents
⚠️ This page may combine multiple inventors who share the name “HASEGAWA TAKEMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUMITOMO ELECTRIC INDUSTRIES
43 patentsUS6901197B2May 31, 2005
Microstructured optical fiber
SUMITOMO ELECTRIC INDUSTRIES79 citations98
US6766088B2Jul 20, 2004
Optical fiber and method for making the same
SUMITOMO ELECTRIC INDUSTRIES51 citations96
US6636677B2Oct 21, 2003
Optical fiber
SUMITOMO ELECTRIC INDUSTRIES31 citations93
US6606440B2Aug 12, 2003
Microstructured optical fiber
SUMITOMO ELECTRIC INDUSTRIES32 citations93
US6571045B2May 27, 2003
Microstructured optical fiber
SUMITOMO ELECTRIC INDUSTRIES26 citations93
US6526209B1Feb 25, 2003
Optical fiber having improved optics and structure
SUMITOMO ELECTRIC INDUSTRIES29 citations93
US7777891B2Aug 17, 2010
Elasticity and viscosity measuring apparatus
SUMITOMO ELECTRIC INDUSTRIES20 citations92
US7440665B2Oct 21, 2008
Optical fiber
SUMITOMO ELECTRIC INDUSTRIES21 citations92
US7043127B2May 9, 2006
Microstructured optical fiber
SUMITOMO ELECTRIC INDUSTRIES43 citations92
US6915053B2Jul 5, 2005
Microstructured optical fiber and optical module
SUMITOMO ELECTRIC INDUSTRIES20 citations92
US7153034B2Dec 26, 2006
Method of constructing an optical transmission line and an optical transmission line
SUMITOMO ELECTRIC INDUSTRIES11 citations84
US6922503B2Jul 26, 2005
Optical system module
SUMITOMO ELECTRIC INDUSTRIES13 citations84
US6868213B2Mar 15, 2005
Optical fiber and production method therefor
SUMITOMO ELECTRIC INDUSTRIES13 citations84
US6859598B2Feb 22, 2005
Microstructured optical fiber
SUMITOMO ELECTRIC INDUSTRIES14 citations84
US7484387B2Feb 3, 2009
Method of making a microstructured optical fiber
SUMITOMO ELECTRIC INDUSTRIES6 citations74
US6850679B2Feb 1, 2005
Microstructured optical fiber and method of making
SUMITOMO ELECTRIC INDUSTRIES10 citations74
US6661954B2Dec 9, 2003
Optical transmission line including a connected part of optical fibers and connecting method
SUMITOMO ELECTRIC INDUSTRIES10 citations74
US11841529B2Dec 12, 2023
Optical fiber and optical cable
SUMITOMO ELECTRIC INDUSTRIES2 citations73
US11754466B2Sep 12, 2023
Mode-dependent loss measurement device and mode-dependent loss measuring method
SUMITOMO ELECTRIC INDUSTRIES2 citations73
US11099322B2Aug 24, 2021
Optical fiber
SUMITOMO ELECTRIC INDUSTRIES2 citations73
US10585234B2Mar 10, 2020
Coupled multicore optical fiber and optical transmission system including same
SUMITOMO ELECTRIC INDUSTRIES4 citations73
US6608955B2Aug 19, 2003
Optical fiber and laser machining apparatus
SUMITOMO ELECTRIC INDUSTRIES11 citations72
US11156529B2Oct 26, 2021
Nonlinearity measuring method and nonlinearity measuring device
SUMITOMO ELECTRIC INDUSTRIES1 citations63
US7340137B2Mar 4, 2008
Optical fiber and optical module
SUMITOMO ELECTRIC INDUSTRIES2 citations63
US6718105B2Apr 6, 2004
Optical fiber
SUMITOMO ELECTRIC INDUSTRIES6 citations63
US12498518B2Dec 16, 2025
Optical fiber
SUMITOMO ELECTRIC INDUSTRIES0 citations62
US11467340B2Oct 11, 2022
Optical fiber
SUMITOMO ELECTRIC INDUSTRIES0 citations62
US11366267B2Jun 21, 2022
Optical fiber
SUMITOMO ELECTRIC INDUSTRIES1 citations62
US11137542B2Oct 5, 2021
Optical fiber
SUMITOMO ELECTRIC INDUSTRIES0 citations62
US10908353B2Feb 2, 2021
Optical fiber and slanted fiber grating
SUMITOMO ELECTRIC INDUSTRIES1 citations60
US12546933B2Feb 10, 2026
Multicore optical fiber
SUMITOMO ELECTRIC INDUSTRIES0 citations58
US12449589B2Oct 21, 2025
Multicore optical fiber
SUMITOMO ELECTRIC INDUSTRIES0 citations57
US12164145B2Dec 10, 2024
Optical fiber and method for producing optical fiber
SUMITOMO ELECTRIC INDUSTRIES0 citations52
US11774672B2Oct 3, 2023
Optical fiber
SUMITOMO ELECTRIC INDUSTRIES0 citations52
US11493690B2Nov 8, 2022
Optical fiber line, module, and method for manufacturing optical fiber line
SUMITOMO ELECTRIC INDUSTRIES0 citations52
US11322904B2May 3, 2022
Optical amplifier and multi-core optical fiber
SUMITOMO ELECTRIC INDUSTRIES0 citations52
US11316316B2Apr 26, 2022
Optical amplifier and multi-core optical fiber
SUMITOMO ELECTRIC INDUSTRIES0 citations52
US7505656B2Mar 17, 2009
Optical fiber and optical fiber device
SUMITOMO ELECTRIC INDUSTRIES0 citations52
US9128249B2Sep 8, 2015
Optical probe and optical measuring method
SUMITOMO ELECTRIC INDUSTRIES1 citations51
US11448821B2Sep 20, 2022
Slant-type fiber grating
SUMITOMO ELECTRIC INDUSTRIES0 citations50
US12204140B2Jan 21, 2025
Gain flattening filter, and method for manufacturing gain flattening filter
SUMITOMO ELECTRIC INDUSTRIES0 citations44
US9453966B2Sep 27, 2016
Optical probe
SUMITOMO ELECTRIC INDUSTRIES0 citations41
US10775555B2Sep 15, 2020
Optical fiber line and optical fiber line manufacturing method
SUMITOMO ELECTRIC INDUSTRIES0 citations38
HASEGAWA TAKEMI
4 patentsUS8654320B2Feb 18, 2014
Beam Path Monitoring Device and Beam Path Monitoring System
HASEGAWA TAKEMI9 citations82
US8325330B2Dec 4, 2012
Optical fibre circuit monitoring system and monitoring device included in this system
HASEGAWA TAKEMI5 citations61
US8868158B2Oct 21, 2014
Optical analyzer
HASEGAWA TAKEMI0 citations40
US8483531B2Jul 9, 2013
Optical fiber
HASEGAWA TAKEMI0 citations40