P

Inventor

DOI MASAHARU

JP69 patents
⚠️ This page may combine multiple inventors who share the name “DOI MASAHARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

FUJITSU LTD

33 patents
US5680497AOct 21, 1997

Optical waveguide device

FUJITSU LTD43 citations95
US5404412AApr 4, 1995

Optical waveguide device

FUJITSU LTD80 citations95
US7526161B2Apr 28, 2009

Optical device

FUJITSU LTD14 citations92
US7263244B2Aug 28, 2007

Optical modulator

FUJITSU LTD19 citations92
US6678428B2Jan 13, 2004

Optical modulator

FUJITSU LTD22 citations92
US6584240B2Jun 24, 2003

Optical modulator having ridge and associated structure on substrate

FUJITSU LTD37 citations92
US6580843B2Jun 17, 2003

Optical device

FUJITSU LTD38 citations92
US5214724AMay 25, 1993

Optical waveguide device with suppressed dc drift

FUJITSU LTD51 citations92
US7729580B2Jun 1, 2010

Waveguide type optical device and manufacturing method of the waveguide type optical device

FUJITSU LTD12 citations84
US7340114B2Mar 4, 2008

Optical waveguide device and optical modulator

FUJITSU LTD17 citations84
US7058241B2Jun 6, 2006

Optical modulator

FUJITSU LTD18 citations84
US6801675B2Oct 5, 2004

Optical modulator

FUJITSU LTD13 citations84
US6741378B2May 25, 2004

Optical modulator having element for varying optical phase by electrooptic effect

FUJITSU LTD14 citations84
US6917732B2Jul 12, 2005

Connecting method of optical function devices, and optical apparatus

FUJITSU LTD12 citations83
US7133578B2Nov 7, 2006

Optical modulator with an impedance matching region

FUJITSU LTD9 citations74
US6999223B2Feb 14, 2006

Optical modulator

FUJITSU LTD6 citations74
US6594407B2Jul 15, 2003

Optical modulator of clock modulation type

FUJITSU LTD11 citations74
US7079732B2Jul 18, 2006

Optical device

FUJITSU LTD9 citations73
US6865306B2Mar 8, 2005

Optical device

FUJITSU LTD8 citations73
US7155072B2Dec 26, 2006

Optical modulator

FUJITSU LTD10 citations72
US7113677B2Sep 26, 2006

Optical modulator, optical waveguide device and acousto-optic tunable filter apparatus

FUJITSU LTD6 citations72
US8805127B2Aug 12, 2014

Optical waveguide device, manufacturing method therefor, optical modulator, polarization mode dispersion compensator, and optical switch

FUJITSU LTD3 citations63
US7941011B2May 10, 2011

Multilevel light intensity modulator

FUJITSU LTD4 citations63
US7787717B2Aug 31, 2010

Optical waveguide device

FUJITSU LTD4 citations63
US7627200B2Dec 1, 2009

Optical device

FUJITSU LTD5 citations63
US7551820B2Jun 23, 2009

Optical device

FUJITSU LTD4 citations63
US7519241B2Apr 14, 2009

Optical device

FUJITSU LTD4 citations63
US7386198B2Jun 10, 2008

Optical waveguide device

FUJITSU LTD3 citations63
US7239764B2Jul 3, 2007

Optical waveguide device with reduced driving voltage

FUJITSU LTD5 citations63
US6950218B2Sep 27, 2005

Optical modulator

FUJITSU LTD6 citations63
US7095559B2Aug 22, 2006

Variable optical delay circuit

FUJITSU LTD5 citations62
US7315676B2Jan 1, 2008

Optical modulator, optical waveguide device and acousto-optic tunable filter apparatus

FUJITSU LTD2 citations61
US7280713B2Oct 9, 2007

Optical modulator, optical waveguide device and acousto-optic tunable filter apparatus

FUJITSU LTD3 citations61

FUJITSU OPTICAL COMPONENTS LTD

8 patents
US10754179B2Aug 25, 2020

Optical modulator, optical modulator module, and optical transmitter module

FUJITSU OPTICAL COMPONENTS LTD8 citations83
US11693290B2Jul 4, 2023

Optical waveguide device

FUJITSU OPTICAL COMPONENTS LTD4 citations74
US10054744B2Aug 21, 2018

Optical module and optical fiber assembly

FUJITSU OPTICAL COMPONENTS LTD2 citations73
US11624965B2Apr 11, 2023

Optical waveguide device

FUJITSU OPTICAL COMPONENTS LTD3 citations72
US10175553B2Jan 8, 2019

Optical module

FUJITSU OPTICAL COMPONENTS LTD4 citations70
US11693291B2Jul 4, 2023

Optical waveguide device and method of manufacturing optical waveguide device

FUJITSU OPTICAL COMPONENTS LTD0 citations62
US11003043B2May 11, 2021

Optical modulator

FUJITSU OPTICAL COMPONENTS LTD1 citations62
US10268099B2Apr 23, 2019

Optical modulator and optical module

FUJITSU OPTICAL COMPONENTS LTD0 citations52

TDK CORP

3 patents
US11086149B2Aug 10, 2021

Electro-optic device

TDK CORP10 citations85
US11003044B2May 11, 2021

Electro-optic device

TDK CORP5 citations73
US10989980B2Apr 27, 2021

Optical modulator

TDK CORP5 citations73

TOSHIBA KK

2 patents
USD495775SSep 7, 2004

Washing machine with a clothing drier

TOSHIBA KK49 citations95
USD491204SJun 8, 2004

Refrigerator

TOSHIBA KK14 citations83

TOYO SODA MFG CO LTD

1 patent
US4877498AOct 31, 1989

Method for producing a metal salt by electrolysis

TOYO SODA MFG CO LTD14 citations72

MIYATAKE TETSUYA

1 patent
US8582928B2Nov 12, 2013

Optical waveguide device, manufacturing method therefor, optical modulator, polarization mode dispersion compensator, and optical switch

MIYATAKE TETSUYA3 citations62

DOI MASAHARU

1 patent
US8280200B2Oct 2, 2012

Polarization conversion device and polarization multiplexing modulator

DOI MASAHARU3 citations60

MITSUBISHI ELECTRIC CORP

1 patent
US7893381B2Feb 22, 2011

Welding set of metal member including permanent magnet and welding method thereof, as well as electric rotating machine

MITSUBISHI ELECTRIC CORP2 citations59

Showing the top 50 of 69 patents by PatentIndex Score.