YU

Yoichi Umeda

SI Sumitomo Metal Industries: 1 patents #630 of 1,462Top 45%
Overall (All Time): #4,041,888 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4474605 Process for refining high-chromium steels Seiichi Masuda, Tohru Matsuo, Masayuki Taga, Hidemasa Nakajima 1984-10-02