KU

Keijiro Umehara

Sumitomo Electric Industries: 3 patents #7,735 of 21,551Top 40%
Overall (All Time): #1,588,719 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
7254507 Analog circuit automatic calibration system Shiro Dosho, Naoshi Yanagisawa, Masaomi Toyama 2007-08-07
7030688 Low-pass filter for a PLL, phase-locked loop and semiconductor integrated circuit Shiro Dosho, Naoshi Yanagisawa, Masaomi Toyama, Masahiro Fukui, Takefumi Yoshikawa +3 more 2006-04-18
6982581 Duty cycle correction circuit Shiro Dosho, Naoshi Yanagisawa, Masaomi Toyama 2006-01-03