Multiplex signaling system,申请号US19320622347-传众专利搜索

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发明名称	Multiplex signaling system
摘要
申请公布号	US1934685(A)	申请公布日期	1933.11.14
申请号	US19320622347	申请日期	1932.07.13
申请人	AMERICAN TELEPHONE AND TELEGRAPH COMPANY	发明人	DEMAREST CHARLES S.
分类号	H04J3/04;H04L5/24	主分类号	H04J3/04
代理机构		代理人
主权项
地址

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