Signaling system,申请号US19350003919-传众专利搜索

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发明名称	Signaling system
摘要
申请公布号	US2118610(A)	申请公布日期	1938.05.24
申请号	US19350003919	申请日期	1935.01.29
申请人	RADIO CORPORATION OF AMERICA	发明人	KOCH WINFIELD R.
分类号	H04N7/04	主分类号	H04N7/04
代理机构		代理人
主权项
地址

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