YO

Yoshihiko Okajima

DK Denki Kagaku Kogyo: 2 patents #165 of 655Top 30%
Overall (All Time): #2,072,270 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
8449143 Metal base circuit board Takeshi Miyakawa, Kenji Miyata, Taiki Nishi 2013-05-28
8071882 Metal base circuit board, LED, and LED light source unit Katsunori Yashima, Keiji Takano, Takuya Okada 2011-12-06