Issued Patents All Time
Showing 25 most recent of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12218545 | Uninterruptible power supply | Ryoji TSURUTA, Tomohiro Tanaka | 2025-02-04 |
| 11929689 | Power conversion device | Ryoji TSURUTA, Tomohiro Tanaka | 2024-03-12 |
| 11439239 | Backrest and chair | Syunsuke ISHIMARU | 2022-09-13 |
| 11019928 | Armrest and chair | Yuuichirou Takagi, Ryo Igarashi, Syouichi Izawa | 2021-06-01 |
| 11019930 | Load support structure for chair, load support body for chair, and chair | Syouichi Izawa | 2021-06-01 |
| 10966530 | Backrest, lumbar support, chair, attachment structure for optional member, optional member, and furniture | Shinpei Totsuka | 2021-04-06 |
| 10932575 | Armrest and chair | Ryo Igarashi, Syouichi Izawa | 2021-03-02 |
| 10756567 | Uninterruptible power supply device | Akihiro Yamanishi | 2020-08-25 |
| 10334953 | Furniture, load support member for chair, and chair | Yoshinori Isogai, Kouichirou Wakizono, Naoyuki Okuda, Syouichi Izawa | 2019-07-02 |
| 10264886 | Reaction force mechanism and chair using same | — | 2019-04-23 |
| 10263457 | Uninterruptible power supply device and uninterruptible power supply system using the same | Kazuki Nishimura, Masahiro Kinoshita | 2019-04-16 |
| 10263459 | Power supply system | Keisuke Ohnishi | 2019-04-16 |
| 10159350 | Chair | Ryo Igarashi | 2018-12-25 |
| 10050469 | Uninterruptible power supply device and uninterruptible power supply system using the same | Kazuki Nishimura, Masahiro Kinoshita | 2018-08-14 |
| 10044281 | Bidirectional insulated DC/DC converter and smart network using the same | Kazunori Sanada, Yoshitaka KAWABATA, Takao Kawabata | 2018-08-07 |
| 9755457 | Uninterruptible power supply apparatus | Tingan Lee, Masaru Toyoda | 2017-09-05 |
| 9603451 | Height adjustment device in fixture, and armrest device for chair provided with height adjustment device | Yuuichirou Takagi, Youichirou Oda, Alexander Hurford | 2017-03-28 |
| 9578968 | Chair | Ryo Igarashi, Syouichi Izawa | 2017-02-28 |
| 8777321 | Stretching structure of chair upholstery material | Sayaka Morio, Ryou Igarashi | 2014-07-15 |
| 8191970 | Backrest device in a chair | Ryo Igarashi, Hiroaki Tsukiji | 2012-06-05 |
| 8172323 | Locking device for a movable member in a chair | — | 2012-05-08 |
| 8172332 | Chair backrest device | Ryo Igarashi, Yoichiro Oda | 2012-05-08 |
| 7837272 | Chair and the structure for stretching a mesh over an element of the chair | Tetsuya Narita, Ryo Igarashi, Akira Kiyoku, Ken Nakayama | 2010-11-23 |
| 7726740 | Backrest-tilting device | — | 2010-06-01 |
| 7246859 | Chair | Ryo Igarashi, Naoki Numa, Ken Nakayama | 2007-07-24 |