Inventor
Hiroshi Masunaga
Inventor
Yokohama, JP
Overview
Patents· 30 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
A47Cprimary
A47CChairs49%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems15%
H02JElectric power networks12%
G06FElectric digital data processing5%
Y10TTechnical subjects covered by former us classification5%
F16CShafts2%
F16HGearing2%
H03KPulse technique2%
H05KPrinted circuits2%
H10DInorganic electric semiconductor devices2%
PatentTitleYear
11,019,928Armrest and chair202111,019,930Load support structure for chair, load support body for chair, and chair202110,966,530Backrest, lumbar support, chair, attachment structure for optional member, optional member, and furniture202110,932,575Armrest and chair202110,932,573Backrest, lumbar support, chair, attachment structure for optional member, optional member, and furniture202110,898,001Armrest and chair202110,756,567Uninterruptible power supply device202010,334,953Furniture, load support member for chair, and chair201910,264,886Reaction force mechanism and chair using same201910,263,457Uninterruptible power supply device and uninterruptible power supply system using the same201910,263,459Power supply system201910,159,350Chair201810,050,469Uninterruptible power supply device and uninterruptible power supply system using the same201810,044,281Bidirectional insulated DC/DC converter and smart network using the same20189,755,457'Uninterruptible power supply apparatus'20179,603,451'Height adjustment device in fixture, and armrest device for chair provided with height adjustment device'20179,578,968'Chair'20178,777,321'Stretching structure of chair upholstery material'20148,191,970'Backrest device in a chair'20128,172,323'Locking device for a movable member in a chair'20128,172,332'Chair backrest device'20127,837,272'Chair and the structure for stretching a mesh over an element of the chair'20107,726,740'Backrest-tilting device'20107,246,859'Chair'20077,243,993'Tilting mechanism for a chair and a chair having the same'20077,097,249'Tilting mechanism for a chair and chair having the same'20066,687,106'Power module'20046,626,497'Backrest of a chair'20036,535,406'Three-level inverter controller reducing commutation loop inductance'20036,257,665'Chair'2001Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2001–2021Patents assigned to OKAMURA CORP (20)· patent assignee history
2001–2021Based in Yokohama, JP· patent location history
2003–2004Patents assigned to MITSUBISHI ELECTRIC CORP (2)· patent assignee history
2003–2019Based in Tokyo, JP· patent location history
2012–2019Patents assigned to MASUNAGA HIROSHI (5)· patent assignee history
2012Patents assigned to IGARASHI RYO (2)· patent assignee history
2017–2020Based in Chuo-ku, JP· patent location history
2017Based in Kanagawa, JP· patent location history
2018–2020Patents assigned to TOSHIBA MITSUBISHI ELEC IND (5)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| OKAMURA CORP | 20 | 2001–2021 |
| MASUNAGA HIROSHIself | 5 | 2012–2019 |
| TOSHIBA MITSUBISHI ELEC IND | 5 | 2018–2020 |
| IGARASHI RYO | 2 | 2012 |
| MITSUBISHI ELECTRIC CORP | 2 | 2003–2004 |
Locations
| Location | Patents | Span |
|---|---|---|
| Yokohama, JP | 21 | 2001–2021 |
| Chuo-ku, JP | 5 | 2017–2020 |
| Tokyo, JP | 3 | 2003–2019 |
| Kanagawa, JP | 1 | 2017 |