Issued Patents All Time
Showing 1–8 of 8 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 |
| 12113927 | Multiple dwelling house interphone system | Masashi Hattori, Ryoji Uno, Kimiaki Fujishima | 2024-10-08 |
| 12052384 | Multiple dwelling house interphone system | Masashi Hattori, Ryoji Uno, Kimiaki Fujishima | 2024-07-30 |
| 11758054 | Multiple dwelling house interphone system | Masashi Hattori, Kimiaki Fujishima, Ryoji Uno | 2023-09-12 |
| 10944940 | Intercom system for collective housing | Kohei Tanaka, Masashi Hattori, Shion Kanai | 2021-03-09 |
| 10721361 | Interphone system and setting apparatus | Seiya Yamakawa | 2020-07-21 |
| 10652378 | Intercom system | Seiya Yamakawa, Akira Kai | 2020-05-12 |