Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10659617 | Building controller and interphone system | Kenji Yasukawa | 2020-05-19 |
| 10469669 | Intercom system | Seiya Yamakawa, Akira Kai | 2019-11-05 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10659617 | Building controller and interphone system | Kenji Yasukawa | 2020-05-19 |
| 10469669 | Intercom system | Seiya Yamakawa, Akira Kai | 2019-11-05 |