Key-operated device for radio systems,申请号US19280278542-传众专利搜索

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发明名称	Key-operated device for radio systems
摘要
申请公布号	US1906106(A)	申请公布日期	1933.04.25
申请号	US19280278542	申请日期	1928.05.17
申请人	ZENITH RADIO CORPORATION	发明人	SCHAEFER JOSEPH M.
分类号	H03J5/12	主分类号	H03J5/12
代理机构		代理人
主权项
地址

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