Inventor

ICHIKAWA JUNICHIRO

JP59 patents

⚠️ This page may combine multiple inventors who share the name “ICHIKAWA JUNICHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SUMITOMO OSAKA CEMENT CO LTD

31 patents

US10088734B2Oct 2, 2018

Waveguide-type optical element

SUMITOMO OSAKA CEMENT CO LTD10 citations84

US7869668B2Jan 11, 2011

Method for generating carrier residual signal and its device

SUMITOMO OSAKA CEMENT CO LTD7 citations84

US7689067B2Mar 30, 2010

Nested modulator

SUMITOMO OSAKA CEMENT CO LTD10 citations84

US7362924B2Apr 22, 2008

Optical modulator

SUMITOMO OSAKA CEMENT CO LTD9 citations84

US7899338B2Mar 1, 2011

Method and device for controlling bias of optical modulator

SUMITOMO OSAKA CEMENT CO LTD15 citations83

US7444039B2Oct 28, 2008

Optical modulator

SUMITOMO OSAKA CEMENT CO LTD10 citations83

US7310453B2Dec 18, 2007

Optical modulator

SUMITOMO OSAKA CEMENT CO LTD18 citations83

US9946100B2Apr 17, 2018

Waveguide type optical element

SUMITOMO OSAKA CEMENT CO LTD7 citations79

US7764422B2Jul 27, 2010

THz wave generation device

SUMITOMO OSAKA CEMENT CO LTD7 citations74

US9599843B2Mar 21, 2017

Optical modulator

SUMITOMO OSAKA CEMENT CO LTD2 citations73

US7831122B2Nov 9, 2010

Optical control device and manufacturing method thereof

SUMITOMO OSAKA CEMENT CO LTD7 citations73

US9519200B2Dec 13, 2016

Optical control device

SUMITOMO OSAKA CEMENT CO LTD6 citations72

US6134372AOct 17, 2000

Light intensity attenuator and attenuating method

SUMITOMO OSAKA CEMENT CO LTD15 citations72

US10498457B2Dec 3, 2019

Optical carrier-suppressed signal generator

SUMITOMO OSAKA CEMENT CO LTD2 citations71

US10502988B2Dec 10, 2019

Optical modulator module

SUMITOMO OSAKA CEMENT CO LTD3 citations69

US10365534B2Jul 30, 2019

Optical waveguide device

SUMITOMO OSAKA CEMENT CO LTD3 citations69

US9235066B2Jan 12, 2016

Optical modulator

SUMITOMO OSAKA CEMENT CO LTD2 citations63

US7768696B2Aug 3, 2010

THZ wave generator

SUMITOMO OSAKA CEMENT CO LTD5 citations63

US11347086B2May 31, 2022

Optical element

SUMITOMO OSAKA CEMENT CO LTD0 citations62

US8380015B2Feb 19, 2013

Optical control device

SUMITOMO OSAKA CEMENT CO LTD4 citations62

US7985294B2Jul 26, 2011

Optical device and method of manufacturing the same

SUMITOMO OSAKA CEMENT CO LTD2 citations62

US7873244B2Jan 18, 2011

Light control device

SUMITOMO OSAKA CEMENT CO LTD3 citations62

US7009758B2Mar 7, 2006

Light control element

SUMITOMO OSAKA CEMENT CO LTD2 citations62

US7397974B2Jul 8, 2008

Optical modulator

SUMITOMO OSAKA CEMENT CO LTD3 citations60

US10502982B2Dec 10, 2019

Optical modulator

SUMITOMO OSAKA CEMENT CO LTD0 citations52

US10365506B2Jul 30, 2019

Optical modulator

SUMITOMO OSAKA CEMENT CO LTD0 citations52

US10338414B2Jul 2, 2019

Optical modulator module

SUMITOMO OSAKA CEMENT CO LTD0 citations52

US9551887B2Jan 24, 2017

Optical modulator

SUMITOMO OSAKA CEMENT CO LTD1 citations52

US9348156B2May 24, 2016

Optical waveguide element and method for manufacturing optical waveguide element

SUMITOMO OSAKA CEMENT CO LTD0 citations52

US7912326B2Mar 22, 2011

Optical control device

SUMITOMO OSAKA CEMENT CO LTD1 citations52

US12504656B2Dec 23, 2025

Optical waveguide element, optical waveguide device, and optical transmission apparatus

SUMITOMO OSAKA CEMENT CO LTD0 citations50

ICHIKAWA JUNICHIRO

4 patents

US8396334B2Mar 12, 2013

Optical waveguide device

ICHIKAWA JUNICHIRO6 citations83

US8644647B2Feb 4, 2014

Optical control device

ICHIKAWA JUNICHIRO11 citations82

US8391651B2Mar 5, 2013

Optical waveguide device

ICHIKAWA JUNICHIRO3 citations62

US8755641B2Jun 17, 2014

Optical modulator

ICHIKAWA JUNICHIRO2 citations61

NEC CORP

3 patents

US6218658B1Apr 17, 2001

Optical fuse

NEC CORP21 citations92

US6539153B2Mar 25, 2003

Light limiter

NEC CORP7 citations73

US6233385B1May 15, 2001

Light limiter

NEC CORP9 citations73

NAT INST FOR MATERIALS SCIENCE

2 patents

US7260280B2Aug 21, 2007

Optical device

NAT INST FOR MATERIALS SCIENCE15 citations92

US7174059B2Feb 6, 2007

Optical device

NAT INST FOR MATERIALS SCIENCE9 citations74

ICHIOKA MASAYUKI

2 patents

US8983239B2Mar 17, 2015

Optical control element having a plurality of optical control portions

ICHIOKA MASAYUKI4 citations67

US9002165B2Apr 7, 2015

Optical waveguide device

ICHIOKA MASAYUKI3 citations56

YAMAMOTO FUTOSHI

2 patents

US8669121B2Mar 11, 2014

Method for forming polarization reversal

YAMAMOTO FUTOSHI2 citations61

US8524509B2Sep 3, 2013

Method for forming polarization reversal

YAMAMOTO FUTOSHI0 citations50

SUMITOMO CEMENT COMPANY LTD

1 patent

US5526448AJun 11, 1996

Optical waveguide modulator having a reduced D.C. drift

SUMITOMO CEMENT COMPANY LTD35 citations89

MOTOYA MASAYUKI

1 patent

US8737773B2May 27, 2014

Optical control element

MOTOYA MASAYUKI19 citations81

OIKAWA SATOSHI

1 patent

US8600197B2Dec 3, 2013

Optical control device

OIKAWA SATOSHI5 citations72

SUMITOMO OSAKA CEMENT CO

1 patent

US9746741B2Aug 29, 2017

Optical modulator

SUMITOMO OSAKA CEMENT CO2 citations67

KAWANISHI TETSUYA

1 patent

US8867042B2Oct 21, 2014

Method for evaluating characteristic of optical modulator having mach-zehnder interferometer

KAWANISHI TETSUYA2 citations59

KONDOU KATSUTOSHI

1 patent

US8315496B2Nov 20, 2012

Optical element

KONDOU KATSUTOSHI0 citations51

Showing the top 50 of 59 patents by PatentIndex Score.