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Sonmin Ryu

TK Tonengeneral Sekiyu K.K.: 1 patents #6 of 32Top 20%
Overall (All Time): #3,481,939 of 4,157,543Top 85%
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Patent #TitleCo-InventorsDate
6750185 Lubricating oil composition for internal combustion engines Shuzo Nemoto, Satoshi Ogano 2004-06-15