SY

Sigemi Yamaguchi

DC Dowa Mining Co.: 1 patents #157 of 324Top 50%
Overall (All Time): #3,679,775 of 4,157,543Top 90%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5733116 Heat treatment apparatus Yoshiyuki Tanno, Hiroshi Shimura 1998-03-31