Inventor

IGARASHI RYO

JP67 patents

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

OKAMURA CORP

30 patents

USD559572SJan 15, 2008

Chair

OKAMURA CORP89 citations98

USD558995SJan 8, 2008

Chair

OKAMURA CORP114 citations98

US6942300B2Sep 13, 2005

Structure for mounting a net member to a frame for a seat or backrest of a chair

OKAMURA CORP192 citations98

US7097249B2Aug 29, 2006

Tilting mechanism for a chair and chair having the same

OKAMURA CORP78 citations97

US7837272B2Nov 23, 2010

Chair and the structure for stretching a mesh over an element of the chair

OKAMURA CORP120 citations96

USD567522SApr 29, 2008

Chair

OKAMURA CORP53 citations96

USD550977SSep 18, 2007

Chair

OKAMURA CORP50 citations96

US7243993B2Jul 17, 2007

Tilting mechanism for a chair and a chair having the same

OKAMURA CORP42 citations95

US9578968B2Feb 28, 2017

Chair

OKAMURA CORP37 citations94

USD587915SMar 10, 2009

Chair

OKAMURA CORP36 citations93

USD575542SAug 26, 2008

Chair

OKAMURA CORP23 citations93

USD567521SApr 29, 2008

Chair

OKAMURA CORP41 citations93

USD559573SJan 15, 2008

Chair

OKAMURA CORP46 citations93

USD559574SJan 15, 2008

Chair

OKAMURA CORP26 citations93

USD558996SJan 8, 2008

Chair

OKAMURA CORP41 citations93

USD558997SJan 8, 2008

Chair

OKAMURA CORP36 citations93

USD555924SNov 27, 2007

Chair

OKAMURA CORP44 citations93

USD550471SSep 11, 2007

Chair

OKAMURA CORP43 citations93

USD514838SFeb 14, 2006

Chair

OKAMURA CORP24 citations93

USD514345SFeb 7, 2006

Chair

OKAMURA CORP28 citations93

USD512578SDec 13, 2005

Chair

OKAMURA CORP30 citations93

USD512579SDec 13, 2005

Chair

OKAMURA CORP33 citations93

US7246859B2Jul 24, 2007

Chair

OKAMURA CORP31 citations92

USD903354SDec 1, 2020

Chair

OKAMURA CORP8 citations84

USD587027SFeb 24, 2009

Chair

OKAMURA CORP11 citations84

USD568057SMay 6, 2008

Chair

OKAMURA CORP16 citations84

US10932575B2Mar 2, 2021

Armrest and chair

OKAMURA CORP4 citations73

US10159350B2Dec 25, 2018

Chair

OKAMURA CORP4 citations73

US11019928B2Jun 1, 2021

Armrest and chair

OKAMURA CORP5 citations71

USD903355SDec 1, 2020

Chair

OKAMURA CORP1 citations63

NIPPON TELEGRAPH & TELEPHONE

7 patents

US11652554B2May 16, 2023

Optical receiving apparatus, optical transmission system, optical transmission method and computer program

NIPPON TELEGRAPH & TELEPHONE2 citations72

US12206461B2Jan 21, 2025

Optical feeding system

NIPPON TELEGRAPH & TELEPHONE0 citations62

US12143157B2Nov 12, 2024

Branch ratio setting system, method for producing optical communication system and optical branch device

NIPPON TELEGRAPH & TELEPHONE0 citations62

US11863211B2Jan 2, 2024

Optical communication system and optical communication method

NIPPON TELEGRAPH & TELEPHONE0 citations61

US12368508B2Jul 22, 2025

Optical access system, optical transmitter, optical receiver, optical transmission method and demodulation method

NIPPON TELEGRAPH & TELEPHONE0 citations52

US12283993B2Apr 22, 2025

Branch ratio calculation method, branch ratio calculation device and computer program

NIPPON TELEGRAPH & TELEPHONE0 citations52

US12160274B2Dec 3, 2024

Optical receiving device and optical receiving method

NIPPON TELEGRAPH & TELEPHONE0 citations52

TOYOTA MOTOR CO LTD

6 patents

US11933629B2Mar 19, 2024

Map data updating device and storage medium storing computer program for map data updating

TOYOTA MOTOR CO LTD2 citations73

US11680822B2Jun 20, 2023

Apparatus and methods for managing maps

TOYOTA MOTOR CO LTD2 citations73

US11486727B2Nov 1, 2022

Map generation device, map generation method, and map generation computer program

TOYOTA MOTOR CO LTD2 citations73

US11680808B2Jun 20, 2023

Map selection device, storage medium storing computer program for map selection and map selection method

TOYOTA MOTOR CO LTD0 citations63

US12511939B2Dec 30, 2025

Photograph acquisition and object identification method and apparatus

TOYOTA MOTOR CO LTD0 citations52

US12437015B1Oct 7, 2025

Object identification and search range adjustment method and apparatus

TOYOTA MOTOR CO LTD0 citations52

IBM

2 patents

US5329190AJul 12, 1994

Termination circuit

IBM31 citations86

US4001612AJan 4, 1977

Linear resistance element for lsi circuitry

IBM10 citations70

MASUNAGA HIROSHI

1 patent

US8172332B2May 8, 2012

Chair backrest device

MASUNAGA HIROSHI75 citations95

IGARASHI RYO

1 patent

US8191970B2Jun 5, 2012

Backrest device in a chair

IGARASHI RYO31 citations87

MORIO SAYAKA

1 patent

US9022482B2May 5, 2015

Stretching structure of a tension member for a chair

MORIO SAYAKA10 citations75

AMAZON TECH INC

1 patent

US11104476B2Aug 31, 2021

Package having a sheet-covered cutout

AMAZON TECH INC3 citations65

NTT INC

1 patent

US12556285B2Feb 17, 2026

Optical transmitter and frequency control method in optical transmission

NTT INC1 citations64

Showing the top 50 of 67 patents by PatentIndex Score.