Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12089488 | Organic electroluminescent device | Norimasa Yokoyama, Shuichi Hayashi | 2024-09-10 |
| 9985216 | Indenoindole derivative and organic electroluminescent element | Makoto Nagaoka, Shigetaka Numazawa, Norimasa Yokoyama, Si-In KIM | 2018-05-29 |
| 9871210 | Naphthotriazole derivatives and organic electroluminescence devices | Makoto Nagaoka, Shigetaka Numazawa, Mari Toriya, Shingo Ozawa | 2018-01-16 |
| 9842999 | Benzotriazole derivative and an organic electroluminescent device | Makoto Nagaoka, Shigetaka Numazawa, Kanae OTSUKA | 2017-12-12 |
| 9837620 | Benzopyridoindole derivative and organic electroluminescent element | Makoto Nagaoka, Kouki KASE, Teruaki Koizumi | 2017-12-05 |
| 9755152 | Compound having substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device | Norimasa Yokoyama, Shuichi Hayashi, Naoaki Kabasawa, Daizou Kanda | 2017-09-05 |
| 9732036 | Compound having carbazole ring structure, and organic electroluminescent device | Norimasa Yokoyama, Makoto Nagaoka, Kazunori Togashi | 2017-08-15 |
| 9525140 | Arylamine compound useful in an organic electroluminescent device | Norimasa Yokoyama, Shuichi Hayashi | 2016-12-20 |
| 9444055 | Organic electroluminescent device | Norimasa Yokoyama, Shuichi Hayashi, Eiji Takahashi | 2016-09-13 |
| 9306174 | Organic electroluminescent device | Norimasa Yokoyama, Makoto Nagaoka, Kazunori Togashi, Eiji Takahashi | 2016-04-05 |
| 9306175 | Organic electroluminescent device | Norimasa Yokoyama, Makoto Nagaoka, Kazunori Togashi, Eiji Takahashi | 2016-04-05 |
| 9196839 | Compound having triphenylamine structure, and organic electroluminescent device | Norimasa Yokoyama, Makoto Nagaoka, Kouki KASE, Shingo Ozawa | 2015-11-24 |
| 8927119 | Compound having substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device | Norimasa Yokoyama, Shuichi Hayashi, Naoaki Kabasawa, Daizou Kanda | 2015-01-06 |
| 8771841 | Organic electroluminescent device | Norimasa Yokoyama, Shuichi Hayashi | 2014-07-08 |
| 8722209 | Compound having pyridoindole ring structure having substituted pyridyl group attached thereto, and organic electroluminescence element | Norimasa Yokoyama, Shuichi Hayashi | 2014-05-13 |
| 8716698 | Organic electroluminescent device containing arylamine compound and bipyridyl compound | Norimasa Yokoyama, Shuichi Hayashi | 2014-05-06 |
| 8624228 | Compound having pyridoindole ring structure bonded with substituted pyridyl group, and organic electroluminescent device | Norimasa Yokoyama, Shuichi Hayashi, Sawa Izumi | 2014-01-07 |
| 8586210 | Compound having substituted anthracene ring structure and pyridoindole ring structure and organic electroluminescence device | Norimasa Yokoyama, Shuichi Hayashi, Sawa Izumi, Naoaki Kabasawa | 2013-11-19 |
| 8377573 | Compound having substituted pyridyl group and pyridoindole ring structure linked through phenylene group, and organic electroluminescent device | Norimasa Yokoyama, Shuichi Hayashi, Sawa Izumi | 2013-02-19 |
| 8252431 | Compound wherein substituted bipyridyl group is connected with pyridoindole ring structure through phenylene group, and organic electroluminescent device | Norimasa Yokoyama, Shuichi Hayashi, Makoto Nagaoka | 2012-08-28 |
| 8247087 | Compound having oxadiazole ring structure bonded with aromatic heterocyclic ring and organic electroluminescent device | Tetsuzo Miki, Norimasa Yokoyama, Shuichi Hayashi, Yoshio Taniguchi, Musubu Ichikawa | 2012-08-21 |
| 8168308 | Compound having pyridoindole ring structure having substituted pyridyl group attached thereto, and organic electroluminescence element | Norimasa Yokoyama, Shuichi Hayashi | 2012-05-01 |
| 8153277 | Compound having thiadiazole ring structure substituted with pyridyl group and organic electroluminescent device | Norimasa Yokoyama, Toru Akisada | 2012-04-10 |
| 8053092 | m-carbazolylphenyl compounds | Tetsuzo Miki, Norimasa Yokoyama, Chihaya Adachi | 2011-11-08 |
| 7902402 | Tetramine compound and organic EL device | Makoto Koike, Atsushi Takesue, Mitsutoshi Anzai | 2011-03-08 |