Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12088217 | Power conversion device, transport system, power conversion method, non-transitory computer-readable storage medium with a program stored thereon, and diagnosis device | Yuta Takashima, Masatoshi Fujikawa | 2024-09-10 |
| 11569456 | Organic electroluminescent element and electronic device | Toshinari Ogiwara, Kei Yoshida, Yumiko Mizuki | 2023-01-31 |
| 10811616 | Organic electroluminescent element and electronic device | Toshinari Ogiwara, Kei Yoshida, Yumiko Mizuki | 2020-10-20 |
| 10547009 | Organic electroluminescent element, electronic device and compound | Kei Yoshida, Toshinari Ogiwara, Yuichiro Kawamura, Masatoshi Saito | 2020-01-28 |
| 10505123 | Compound and organic electroluminescent device using same | Kei Yoshida, Toshihiro Iwakuma | 2019-12-10 |
| 9978952 | Fused heterocyclic aromatic derivative, organic electroluminescence element material, and organic electroluminescence element using same | Yuki Nakano, Kei Yoshida, Hideaki Nagashima | 2018-05-22 |
| 9960364 | Ladder compound, and organic electroluminescent element using same | Yuki Nakano, Kei Yoshida | 2018-05-01 |
| 9947876 | Organic electroluminescence device and electronic device | Yuichiro Kawamura, Toshinari Ogiwara | 2018-04-17 |
| 9905779 | Organic electroluminescent element and electronic device | Toshinari Ogiwara, Kei Yoshida, Yumiko Mizuki | 2018-02-27 |
| 9842996 | Amine compound having hetero-fused ring and organic electroluminescent element using amine compound | Kei Yoshida, Toshihiro Iwakuma | 2017-12-12 |
| 9604972 | Nitrogen-containing heteroaromatic ring compound | Kei Yoshida | 2017-03-28 |
| 9496508 | Material for organic electroluminescent element and organic electroluminescent element using same | Takushi SHIOMI, Hideaki Nagashima | 2016-11-15 |
| 9419231 | Organic electroluminescence device | Kei Yoshida, Toshihiro Iwakuma, Hideaki Nagashima | 2016-08-16 |