YW

Yohei Wakai

Nichia: 17 patents #100 of 1,531Top 7%
📍 Anan, JP: #39 of 306 inventorsTop 15%
Overall (All Time): #275,608 of 4,157,543Top 7%
17
Patents All Time

Issued Patents All Time

Showing 1–17 of 17 patents

Patent #TitleCo-InventorsDate
10381516 Semiconductor light emitting device having a recess with irregularities Masahiko Onishi 2019-08-13
9559253 Method of manufacturing nitride semiconductor element Junya Narita, Kazuto Okamoto, Mizuki Nishioka 2017-01-31
9525103 Sapphire substrate having elongated projection and semiconductor light emitting device utilizing the same Junya Narita, Takuya Okada, Yoshiki Inoue, Naoya Sako, Katsuyoshi Kadan 2016-12-20
9490393 Semiconductor light emitting device with light extraction surface Masahiko Onishi 2016-11-08
9159868 Method for manufacturing semiconductor light emitting device Hiroaki Matsumura, Kenji Oka 2015-10-13
9070814 LED sapphire substrate with groups of three projections on the surface Junya Narita, Takuya Okada, Yoshiki Inoue, Naoya Sako, Katsuyoshi Kadan 2015-06-30
9054271 Method for manufacturing substrate for semiconductor light emitting element and semiconductor light emitting element using the same Shunsuke Minato, Junya Narita, Yukio Narukawa, Motokazu Yamada 2015-06-09
9012936 Sapphire substrate having triangular projections with portions extending in direction of substrate crystal axis Junya Narita, Takuya Okada, Yoshiki Inoue, Naoya Sako, Katsuyoshi Kadan 2015-04-21
8883529 Method for manufacturing semiconductor light emitting device Hiroaki Matsumura, Kenji Oka 2014-11-11
8847262 Sapphire substrate having triangular projections with bottom sides formed of outwardly curved lines Junya Narita, Takuya Okada, Yoshiki Inoue, Naoya Sako, Katsuyoshi Kadan 2014-09-30
8847263 Sapphire substrate having triangular projections with outer perimeter formed of continuous curve Junya Narita, Takuya Okada, Yoshiki Inoue, Naoya Sako, Katsuyoshi Kadan 2014-09-30
8779463 Sapphire substrate and nitride semiconductor light emitting device Junya Narita, Takayoshi WAKAKI 2014-07-15
8686457 Method for manufacturing substrate for semiconductor light emitting element and semiconductor light emitting element using the same Shunsuke Minato, Junya Narita, Yukio Narukawa, Motokazu Yamada 2014-04-01
8552445 Semiconductor light emitting device and method for manufacturing the same Hiroaki Matsumura, Kenji Oka 2013-10-08
8394652 Method for manufacturing substrate for semiconductor light emitting element and semiconductor light emitting element using the same Shunsuke Minato, Junya Narita, Yukio Narukawa, Motokazu Yamada 2013-03-12
8236591 Semiconductor light emitting element and method for manufacturing the same Takashi Ichihara, Hirofumi Yoshida, Takao Yamada 2012-08-07
7781790 Method for manufacturing substrate for semiconductor light emitting element and semiconductor light emitting element using the same Shunsuke Minato, Junya Narita, Yukio Narukawa, Motokazu Yamada 2010-08-24