Material for contact points and the like,申请号US19250058649-传众专利搜索

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发明名称	Material for contact points and the like
摘要
申请公布号	US1774689(A)	申请公布日期	1930.09.02
申请号	US19250058649	申请日期	1925.09.25
申请人	WILLIAMS JOSEPH A	发明人	WILLIAMS JOSEPH A.
分类号	H01H1/023	主分类号	H01H1/023
代理机构		代理人
主权项
地址

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