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Inventor
ITOH TARO
JP
2 patents
Patents
2 patents
US6682078B2
Jan 27, 2004
Ring groove for oil ring with coil expander of piston
NIPPON PISTON RING CO LTD
4 citations
58
US6547251B1
Apr 15, 2003
Ring groove for oil ring with coil expander of piston
NIPPON PISTON RING CO LTD
4 citations
58