System of air and wire radio communication and alarm,申请号US19410402313-传众专利搜索

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发明名称	System of air and wire radio communication and alarm
摘要
申请公布号	US2289485(A)	申请公布日期	1942.07.14
申请号	US19410402313	申请日期	1941.07.14
申请人	ELECTRA-VOICE CORPORATION	发明人	SR. BERKEY E. COVER,
分类号	G08B27/00	主分类号	G08B27/00
代理机构		代理人
主权项
地址

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