Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11168502 | Door device | Kazuyoshi Oshima, Masaya Suzuki, Tadashi Iijima | 2021-11-09 |
| D776520 | Stay for furniture | Tadashi Iijima | 2017-01-17 |
| 9500017 | Opening and closing device | — | 2016-11-22 |
| D716130 | Hinge for furniture | Kazuaki Kashiwaguma | 2014-10-28 |
| D716129 | Hinge for furniture | Kazuaki Kashiwaguma | 2014-10-28 |
| 8739468 | Door opening and closing device | Koushi Yamaguchi, Kazuaki Kashiwaguma | 2014-06-03 |
| D639136 | Door closer | Koushi Yamaguchi, Kazuaki Kashiwaguma | 2011-06-07 |