Issued Patents 2025
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12294671 | Multiple dwelling house interphone system | Masashi Hattori, Kimiaki Fujishima, Ryoji Uno | 2025-05-06 |
| 12219096 | Multiple dwelling house interphone system | Masashi Hattori, Kimiaki Fujishima, Ryoji Uno | 2025-02-04 |