YK

Yoichiro Koizumi

HI Hitachi: 1 patents #17,742 of 28,497Top 65%
📍 Hitachinaka, JP: #1,699 of 2,447 inventorsTop 70%
Overall (All Time): #3,857,475 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5140499 Gas-insulated switching device Naoki Amano, Toru Tsubaki 1992-08-18