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Souichi Shimomura
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Yono, JP
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last 30 patents
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Patent Grant
Rocker arm having wear resistant scuffing resistant portion
Patent number
4,870,931
Issue date
Oct 3, 1989
Nippon Piston Ring Co., Ltd.
Yoshikatsu Nakamura
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...