Means for intercommunication,申请号US19330668182-传众专利搜索

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发明名称	Means for intercommunication
摘要
申请公布号	US2005935(A)	申请公布日期	1935.06.25
申请号	US19330668182	申请日期	1933.04.27
申请人	COLVIN CHARLES H	发明人	COLVIN CHARLES H.
分类号	G09B9/08	主分类号	G09B9/08
代理机构		代理人
主权项
地址

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