Oil-conserving piston,申请号US19300451801-传众专利搜索

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发明名称	Oil-conserving piston
摘要
申请公布号	US1782428(A)	申请公布日期	1930.11.25
申请号	US19300451801	申请日期	1930.05.12
申请人	JOHNSON CHARLES E	发明人	JOHNSON CHARLES E.
分类号	F16J1/08	主分类号	F16J1/08
代理机构		代理人
主权项
地址

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