Electric frequency-transforming device,申请号US19280281468-传众专利搜索

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发明名称	Electric frequency-transforming device
摘要
申请公布号	US1927425(A)	申请公布日期	1933.09.19
申请号	US19280281468	申请日期	1928.05.29
申请人	RADIO CORPORATION	发明人	MARK JAN VAN DER;POL BALTHAZAR VAN DER
分类号	H03B19/16	主分类号	H03B19/16
代理机构		代理人
主权项
地址

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