ACTIVE ACOUSTIC ATTENUATION SYSTEM WITH DIFFERENTIAL FILTERING,申请号EP19890304255-传众专利搜索

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发明名称	ACTIVE ACOUSTIC ATTENUATION SYSTEM WITH DIFFERENTIAL FILTERING
摘要
申请公布号	EP0340974(A3)	申请公布日期	1990.09.05
申请号	EP19890304255	申请日期	1989.04.27
申请人	NELSON INDUSTRIES, INC.	发明人	ALLIE, MARK C.
分类号	H04R3/00;G10K11/178;(IPC1-7):G10K11/16	主分类号	H04R3/00
代理机构		代理人
主权项
地址

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