Speech privacy system,申请号US19410414054-传众专利搜索

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发明名称	Speech privacy system
摘要
申请公布号	US2406351(A)	申请公布日期	1946.08.27
申请号	US19410414054	申请日期	1941.10.08
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	MACNAIR WALTER A.
分类号	H04K1/06	主分类号	H04K1/06
代理机构		代理人
主权项
地址

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