Secret carrier signaling method and system,申请号US19460691853-传众专利搜索

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发明名称	Secret carrier signaling method and system
摘要
申请公布号	US2530824(A)	申请公布日期	1950.11.21
申请号	US19460691853	申请日期	1946.08.20
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	KING KENNETH L.
分类号	H04K1/04	主分类号	H04K1/04
代理机构		代理人
主权项
地址

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