Piston ring,申请号US19510206408-传众专利搜索

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发明名称	Piston ring
摘要
申请公布号	US2663602(A)	申请公布日期	1953.12.22
申请号	US19510206408	申请日期	1951.01.17
申请人	OLSEN ERNEST R	发明人	OLSEN ERNEST R.
分类号	F16J9/06;F16J9/20	主分类号	F16J9/06
代理机构		代理人
主权项
地址

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