Inventor · disambiguated record
Hiroshi Masunaga
Also filed as: MASUNAGA HIROSHI
31 granted patents·11 pending applications·883 citations·filing 1999–2023
97Inventor score
Files withOKAMURA CORP24MASUNAGA HIROSHI6TOSHIBA MITSUBISHI ELEC IND4MITSUBISHI ELECTRIC CORP3TOSHIBA MITSUBISHI ELECTRIC INDUSTRIAL SYSTEMS CORP2
Top patents by PatentIndex Score
42 records- 0197US6257665B1ChairOKAMURA CORP·Filed 1999·Granted Jul 10, 2001·189 cites·16 claims
- 0296US9578968B2ChairOKAMURA CORP·Filed 2013·Granted Feb 28, 2017·37 cites·17 claims
- 0396US6626497B2Backrest of a chairOKAMURA CORP·Filed 2001·Granted Sep 30, 2003·130 cites·6 claims
- 0495US7837272B2Chair and the structure for stretching a mesh over an element of the chairOKAMURA CORP·Filed 2005·Granted Nov 23, 2010·120 cites·14 claims
- 0595US7097249B2Tilting mechanism for a chair and chair having the sameOKAMURA CORP·Filed 2003·Granted Aug 29, 2006·78 cites·12 claims
- 0693US8172332B2Chair backrest deviceMASUNAGA HIROSHI·Filed 2007·Granted May 8, 2012·75 cites·6 claims
- 0793US7726740B2Backrest-tilting deviceOKAMURA CORP·Filed 2005·Granted Jun 1, 2010·57 cites·8 claims
- 0892US7243993B2Tilting mechanism for a chair and a chair having the sameOKAMURA CORP·Filed 2006·Granted Jul 17, 2007·42 cites·3 claims
- 0989US7246859B2ChairOKAMURA CORP·Filed 2006·Granted Jul 24, 2007·31 cites·1 claims
- 1085US9603451B2Height adjustment device in fixture, and armrest device for chair provided with height adjustment deviceOKAMURA CORP·Filed 2013·Granted Mar 28, 2017·18 cites·8 claims
- 1184US10263457B2Uninterruptible power supply device and uninterruptible power supply system using the sameTOSHIBA MITSUBISHI ELEC IND·Filed 2015·Granted Apr 16, 2019·5 cites·4 claims
- 1281US10050469B2Uninterruptible power supply device and uninterruptible power supply system using the sameTOSHIBA MITSUBISHI ELEC IND·Filed 2015·Granted Aug 14, 2018·4 cites·6 claims
- 1381US9755457B2Uninterruptible power supply apparatusTOSHIBA MITSUBISHI ELECTRIC INDUSTRIAL SYSTEMS CORP·Filed 2015·Granted Sep 5, 2017·5 cites·5 claims
- 1481US8191970B2Backrest device in a chairIGARASHI RYO·Filed 2006·Granted Jun 5, 2012·31 cites·8 claims
- 1580US11019928B2Armrest and chairOKAMURA CORP·Filed 2017·Granted Jun 1, 2021·5 cites·4 claims
- 1678US11439239B2Backrest and chairOKAMURA CORP·Filed 2019·Granted Sep 13, 2022·6 cites·6 claims
- 1778US10932575B2Armrest and chairOKAMURA CORP·Filed 2017·Granted Mar 2, 2021·4 cites·8 claims
- 1875US10966530B2Backrest, lumbar support, chair, attachment structure for optional member, optional member, and furnitureOKAMURA CORP·Filed 2017·Granted Apr 6, 2021·4 cites·13 claims
- 1973US8777321B2Stretching structure of chair upholstery materialMASUNAGA HIROSHI·Filed 2011·Granted Jul 15, 2014·9 cites·6 claims
- 2073US6687106B1Power moduleMITSUBISHI ELECTRIC CORP·Filed 2000·Granted Feb 3, 2004·16 cites·5 claims
- 2167US10756567B2Uninterruptible power supply deviceTOSHIBA MITSUBISHI ELEC IND·Filed 2015·Granted Aug 25, 2020·2 cites·7 claims
- 2266US10159350B2ChairOKAMURA CORP·Filed 2014·Granted Dec 25, 2018·4 cites·12 claims
- 2360US10264886B2Reaction force mechanism and chair using sameOKAMURA CORP·Filed 2016·Granted Apr 23, 2019·1 cites·11 claims
- 2456US8172323B2Locking device for a movable member in a chairMASUNAGA HIROSHI·Filed 2008·Granted May 8, 2012·1 cites·2 claims
- 2555US2025176720A1ChairOKAMURA CORP·Filed 2023·Application pending·0 cites
- 2655US2025228367A1ChairOKAMURA CORP·Filed 2023·Application pending·0 cites
- 2752US2011198907A1ChairMASUNAGA HIROSHI·Filed 2009·Application pending·0 cites
- 2850US6535406B1Three-level inverter controller reducing commutation loop inductanceMITSUBISHI ELECTRIC CORP·Filed 2002·Granted Mar 18, 2003·9 cites·10 claims
- 2950US2015265058A1ChairOKAMURA CORP·Filed 2013·Application pending·0 cites
- 3047US12218545B2Uninterruptible power supplyTMEIC CORP·Filed 2021·Granted Feb 4, 2025·0 cites·15 claims
- 3147US11019930B2Load support structure for chair, load support body for chair, and chairOKAMURA CORP·Filed 2017·Granted Jun 1, 2021·0 cites·13 claims
- 3247US2016220036A1ChairOKAMURA CORP·Filed 2014·Application pending·0 cites
- 3346US2025000259A1ChairOKAMURA CORP·Filed 2022·Application pending·0 cites
- 3446US2024389756A1Load-supporting structure for chair and chairOKAMURA CORP·Filed 2022·Application pending·0 cites
- 3546US2024389755A1ChairOKAMURA CORP·Filed 2022·Application pending·0 cites
- 3643US10044281B2Bidirectional insulated DC/DC converter and smart network using the sameTOSHIBA MITSUBISHI ELEC IND·Filed 2014·Granted Aug 7, 2018·0 cites·11 claims
- 3743US2013207427A1Chair with armrestMASUNAGA HIROSHI·Filed 2011·Application pending·0 cites
- 3842US11929689B2Power conversion deviceTOSHIBA MITSUBISHI ELECTRIC INDUSTRIAL SYSTEMS CORP·Filed 2019·Granted Mar 12, 2024·0 cites·7 claims
- 3942US2013169017A1ChairMASUNAGA HIROSHI·Filed 2011·Application pending·0 cites
- 4039US10334953B2Furniture, load support member for chair, and chairOKAMURA CORP·Filed 2015·Granted Jul 2, 2019·0 cites·10 claims
- 4134US10263459B2Power supply systemOHNISHI KEISUKE·Filed 2012·Granted Apr 16, 2019·0 cites·5 claims
- 4232US2003086231A1Power conversion apparatusMITSUBISHI ELECTRIC CORP·Filed 2002·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Hiroshi Masunaga files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →