KY

Kazuyuki Yamahata

RI Riken: 1 patents #679 of 1,824Top 40%
Overall (All Time): #2,841,116 of 4,157,543Top 70%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
10197160 Oil ring Daisuke Nakamura, Mitsuhiro Adachi 2019-02-05