Radio receiving system,申请号US19280257224-传众专利搜索

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发明名称	Radio receiving system
摘要
申请公布号	US1837999(A)	申请公布日期	1931.12.22
申请号	US19280257224	申请日期	1928.02.27
申请人	ALFRED RISTOW	发明人	RISTOW ALFRED
分类号	H03J1/20;H03J9/00	主分类号	H03J1/20
代理机构		代理人
主权项
地址

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