Conference circuit with suppressed sidetones,申请号US19640382188-传众专利搜索

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发明名称	Conference circuit with suppressed sidetones
摘要
申请公布号	US3399275(A)	申请公布日期	1968.08.27
申请号	US19640382188	申请日期	1964.07.13
申请人	STROMBERG-CARLSON CORPORATION	发明人	NIERTIT FRANK;PANKOTAY FERENCE;SHIRMAN JACK
分类号	H04M3/56	主分类号	H04M3/56
代理机构		代理人
主权项
地址

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