SN

Shunro Nagata

KC Kawatetsu Mining Co.: 1 patents #20 of 33Top 65%
Overall (All Time): #3,977,554 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4676964 Process for purifying silica Akira Seki, Yuuki Narita, Yoshio Aso 1987-06-30