KO

Keiji Okinaka

IC Idemitsu Kosan Co.: 2 patents #19 of 106Top 20%
Overall (2025): #109,654 of 469,880Top 25%
2
Patents 2025

Issued Patents 2025

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
12364160 Organic electroluminescent element and electronic device Toshinari Ogiwara, Satomi TASAKI, Masahiro Kawamura, Yoshiaki Takahashi 2025-07-15
12200961 Organic electroluminescence element, display device, and electronic apparatus Kazuki Nishimura, Toshinari Ogiwara, Keiichi YASUKAWA 2025-01-14