Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12245445 | White light source including LED and phosphors | Ryoji Tsuda, Naotoshi Matsuda, Yoshitaka Funayama | 2025-03-04 |
| 11563155 | White light source including LED and phosphors | Ryoji Tsuda, Naotoshi Matsuda, Yoshitaka Funayama | 2023-01-24 |
| 11084979 | Europium-activated alkaline-earth chloroapatite phosphor and light-emitting device thereof | Naotoshi Matsuda, Masahiko Yamakawa, Hirofumi Takemura, Yasuhiro Shirakawa | 2021-08-10 |
| 10957826 | White light source including LED and phosphors | Ryoji Tsuda, Naotoshi Matsuda, Yoshitaka Funayama | 2021-03-23 |
| 10473274 | White light source system | Masahiko Yamakawa, Ryoji Tsuda, Yasumasa Ooya, Yasuhiro Shirakawa, Junji Taniguchi | 2019-11-12 |
| 9115855 | White light source | Masahiko Yamakawa, Yasumasa Ooya | 2015-08-25 |