SN

Seiichi Nagaoka

SC Sumitomo Osaka Cement Co.: 1 patents #199 of 327Top 65%
Overall (All Time): #3,551,179 of 4,157,543Top 90%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6419741 Cement clinker and cement containing the same Tatsuo Ikabata, Takanori Yamamoto, Tatsushi Akiyama, Ayaji Yasumoto 2002-07-16