Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10616420 | Intercom system | Seiya Yamakawa, Kenji Yasukawa | 2020-04-07 |
| 10554823 | Building controller and interphone system | Akira Kai | 2020-02-04 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10616420 | Intercom system | Seiya Yamakawa, Kenji Yasukawa | 2020-04-07 |
| 10554823 | Building controller and interphone system | Akira Kai | 2020-02-04 |