KO

Keiji Okinaka

Canon: 38 patents #1,203 of 19,416Top 7%
IC Idemitsu Kosan Co.: 10 patents #152 of 1,237Top 15%
Overall (All Time): #57,136 of 4,157,543Top 2%
48
Patents All Time

Issued Patents All Time

Showing 26–48 of 48 patents

Patent #TitleCo-InventorsDate
8072136 Compound and organic light emitting device using the compound Satoshi Igawa, Shinjiro Okada, Jun Kamatani, Naoki Yamada, Masashi Hashimoto +3 more 2011-12-06
8026664 Compound and organic light emitting device Akihito Saitoh, Satoshi Igawa, Jun Kamatani, Naoki Yamada, Masashi Hashimoto +5 more 2011-09-27
7998597 Organic light emitting device Akihito Saitoh, Satoshi Igawa, Jun Kamatani, Naoki Yamada, Masashi Hashimoto +5 more 2011-08-16
7982213 Phenanthroline compound and organic light emitting device using same Maki Okajima, Tatsundo Kawai, Takao Takiguchi, Koichi Suzuki, Akihiro Senoo +1 more 2011-07-19
7960041 Fused ring aromatic compound and organic light-emitting device using same Satoshi Igawa, Masashi Hashimoto, Shinjiro Okada, Takao Takiguchi 2011-06-14
7952269 Organic light-emitting device Masataka Yashima, Akihito Saitoh, Naoki Yamada, Akihiro Senoo, Kazunori Ueno 2011-05-31
7932592 Compound and organic light-emitting element Akihito Saitoh, Satoshi Igawa, Naoki Yamada, Chika Negishi, Takao Takiguchi +1 more 2011-04-26
7919199 Organic light emitting device Akihito Saitoh, Naoki Yamada, Masataka Yashima, Koichi Suzuki, Akihiro Senoo +1 more 2011-04-05
7785719 Fluorene compound and organic light-emitting device Naoki Yamada, Akihito Saitoh, Masataka Yashima, Akihiro Senoo, Kazunori Ueno 2010-08-31
7709104 Aminoanthryl derivative-substituted pyrene compound and organic light-emitting device Akihito Saitoh, Naoki Yamada, Masataka Yashima, Akihiro Senoo, Kazunori Ueno 2010-05-04
7691492 Fluorene compound and organic light-emitting device using same Naoki Yamada, Akihito Saitoh, Koichi Suzuki, Akihiro Senoo 2010-04-06
7604873 Organic light emitting device Akihito Saitoh, Naoki Yamada, Masataka Yashima, Koichi Suzuki, Akihiro Senoo +1 more 2009-10-20
7550594 Phenanthroline compound and organic light emitting device using same Maki Okajima, Tatsundo Kawai, Takao Takiguchi, Koichi Suzuki, Akihiro Senoo +1 more 2009-06-23
7491450 Organic electroluminescent device Akihito Saitoh, Koichi Suzuki, Akihiro Senoo, Kazunori Ueno 2009-02-17
7466074 Organic light-emitting device Naoki Yamada, Akihito Saitoh 2008-12-16
7375250 Aminoanthryl derivative substitution compound and organic electroluminescence device using the same Akihito Saitoh, Akihiro Senoo, Kazunori Ueno, Koichi Suzuki 2008-05-20
7358409 Substituted anthryl derivative and electroluminescence device using the same Akihito Saitoh, Akihiro Senoo, Kazunori Ueno, Koichi Suzuki 2008-04-15
7355339 Organic electroluminescent display and apparatus including organic electroluminescent display Hikaru Hoshi 2008-04-08
7309533 Substituted anthryl derivative and electroluminescence device using the same Akihito Saitoh, Koichi Suzuki, Akihiro Senoo, Kazunori Ueno 2007-12-18
7173131 Anthryl derivative group substituted compound, and organic luminescent device making use of same Akihito Saitoh, Koichi Suzuki, Akihiro Senoo, Kazunori Ueno 2007-02-06
7129386 Substituted anthryl derivative and electroluminescence device using the same Akihito Saitoh, Akihiro Senoo, Kazunori Ueno, Koichi Suzuki 2006-10-31
7034454 Organic light emitting device with reverse intersystem crossing light emitting molecules Tatsundo Kawai, Koichi Suzuki, Hiroshi Tanabe, Naoki Yamada, Chika Negishi +2 more 2006-04-25
6985259 Threshold matrix, and method and apparatus of reproducing gray levels using threshold matrix Takashi Suzuki 2006-01-10