Device for the transmission of sound from rooms having a high noise level,申请号US19530390187-传众专利搜索

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发明名称	Device for the transmission of sound from rooms having a high noise level
摘要
申请公布号	US2838127(A)	申请公布日期	1958.06.10
申请号	US19530390187	申请日期	1953.11.04
申请人	NORTH AMERICAN PHILIPS COMPANY, INC.	发明人	JILSKI THEODOR WILHELM ERNST;DENKHAUS OTTO OSKAR SIEGFRIED
分类号	H04R1/34	主分类号	H04R1/34
代理机构		代理人
主权项
地址

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