Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10721361 | Interphone system and setting apparatus | Seiya Yamakawa | 2020-07-21 |
| 10652378 | Intercom system | Seiya Yamakawa, Akira Kai | 2020-05-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10721361 | Interphone system and setting apparatus | Seiya Yamakawa | 2020-07-21 |
| 10652378 | Intercom system | Seiya Yamakawa, Akira Kai | 2020-05-12 |