YH

Yukio Hagiwara

PE Pentax: 2 patents #412 of 761Top 55%
NE Nec: 2 patents #5,510 of 14,502Top 40%
Overall (All Time): #1,303,382 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4852161 Echo canceller using an echo path status detection 1989-07-25
4658420 Tone responsible disabler circuit for an echo canceller Yuzo Fukushi 1987-04-14
4447138 Objective system for video disc Takahiro Sugiyama 1984-05-08
4389100 Objective system for video disc Takahiro Sugiyama 1983-06-21