Packing ring and method of making,申请号US19300430521-传众专利搜索

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发明名称	Packing ring and method of making
摘要
申请公布号	US1914632(A)	申请公布日期	1933.06.20
申请号	US19300430521	申请日期	1930.02.24
申请人	DURAMETALLIC CORPORATION	发明人	CALEY EPHRAIM
分类号	F16J15/22	主分类号	F16J15/22
代理机构		代理人
主权项
地址

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