Acoustic coupler for condenser microphones,申请号US19440565757-传众专利搜索

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发明名称	Acoustic coupler for condenser microphones
摘要
申请公布号	US2405858(A)	申请公布日期	1946.08.13
申请号	US19440565757	申请日期	1944.11.29
申请人	SILENT HAROLD C	发明人	SILENT HAROLD C.
分类号	H04R19/04	主分类号	H04R19/04
代理机构		代理人
主权项
地址

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