VARIABLE RESISTANCE DEVICE,申请号CAD438079-传众专利搜索

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发明名称	VARIABLE RESISTANCE DEVICE
摘要
申请公布号	CA438079(A)	申请公布日期	1946.11.19
申请号	CAD438079	申请日期
申请人	FEDERAL TELEPHONE AND RADIO CORPORATION	发明人	GEORGE H. ERB
分类号		主分类号
代理机构		代理人
主权项
地址

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