Issued Patents 2017
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9818949 | Compound having acridan ring structure, and organic electroluminescent device | Norimasa Yokoyama, Makoto Nagaoka, Eiji Takahashi | 2017-11-14 |
| 9755152 | Compound having substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device | Norimasa Yokoyama, Shuichi Hayashi, Daizou Kanda, Shigeru Kusano | 2017-09-05 |
| 9705092 | Phosphorescent organic light emitting devices combined with hole transport material having high operating stability | Hitoshi Yamamoto, Michael S. Weaver, Norimasa Yokoyama, Makoto Nagaoka | 2017-07-11 |
| 9705099 | Phosphorescent organic light emitting devices having a hole transporting cohost material in the emissive region | Vadim Adamovich, Hitoshi Yamamoto, Michael S. Weaver, Norimasa Yokoyama, Makoto Nagaoka | 2017-07-11 |
| 9634258 | Compounds having bipyridyl group and carbazole ring, and organic electroluminescent element | Norimasa Yokoyama, Musubu Ichikawa, Sohei Otsuru | 2017-04-25 |