DIGITAL SPEECH DETECTION SYSTEM,申请号USD3520999-传众专利搜索

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发明名称	DIGITAL SPEECH DETECTION SYSTEM
摘要
申请公布号	US3520999(A)	申请公布日期	1970.07.21
申请号	USD3520999	申请日期	1967.03.27
申请人	BELL TELEPHONE LAB. INC.	发明人	CARL J. MAY JR.
分类号	H04J3/17;(IPC1-7):H04J5/00	主分类号	H04J3/17
代理机构		代理人
主权项
地址

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