IS

Isao Sugihara

DK Denki Kagaku Kogyo: 1 patents #291 of 655Top 45%
Overall (All Time): #4,000,909 of 4,157,543Top 100%
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Patent #TitleCo-InventorsDate
4608244 Acetylene black Akio Nishijima, Michio Toriguchi 1986-08-26