SD

Shigetaka Douzono

Sumitomo Electric Industries: 2 patents #693 of 4,178Top 20%
Overall (2004): #41,827 of 270,089Top 20%
2
Patents 2004

Issued Patents 2004

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6764191 Illumination type keyboard Takefumi Inoue, Tetsuya Koma, Yoshiharu Abe 2004-07-20
6686549 Illuminated keyboard switch Yoshiharu Abe 2004-02-03