Piston ring,申请号US19480035547-传众专利搜索

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法人/股东/高管

发明名称	Piston ring
摘要
申请公布号	US2522764(A)	申请公布日期	1950.09.19
申请号	US19480035547	申请日期	1948.06.28
申请人	ROBERTS GEORGE H	发明人	ROBERTS GEORGE H.
分类号	F16J9/20	主分类号	F16J9/20
代理机构		代理人
主权项
地址

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