KY

Keiichi YASUKAWA

IC Idemitsu Kosan Co.: 6 patents #239 of 1,237Top 20%
📍 Chiyoda, JP: #537 of 1,712 inventorsTop 35%
Overall (All Time): #771,868 of 4,157,543Top 20%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
12421450 Compounds, materials for organic electroluminescent devices, organic electroluminescent devices, and electronic devices Hiromi Nakano, Hisato MATSUMOTO, Toshinari Ogiwara 2025-09-23
12274168 Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic appliance Shota SAWANO, Hiromi Nakano, Takushi SHIOMI 2025-04-08
12200961 Organic electroluminescence element, display device, and electronic apparatus Kazuki Nishimura, Toshinari Ogiwara, Keiji Okinaka 2025-01-14
11944009 Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic device Shota SAWANO, Keiji Okinaka, Toshinari Ogiwara, Takushi SHIOMI 2024-03-26
11482681 Compound, material for organic electroluminescence element, organic electroluminescence element, and electronic device Shota SAWANO, Keiji Okinaka, Toshinari Ogiwara, Takushi SHIOMI 2022-10-25
11201297 Organic electroluminescence device and electronic device Kei YOSHIZAKI, Toshinari Ogiwara, Yuichiro Kawamura, Kei Yoshida 2021-12-14