TO

Tsutomu Onuma

HI Hitachi: 1 patents #311 of 1,214Top 30%
Overall (1982): #26,366 of 81,411Top 35%
1
Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4348131 Welded structure having improved mechanical strength and process for making same Shizuka Shimanuki, Toshimi Matsumoto, Hiroshi Sato, Seishin Kirihara 1982-09-07