TONE FREQUENCY NOISE FILTER,申请号USD3451502-传众专利搜索

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发明名称	TONE FREQUENCY NOISE FILTER
摘要
申请公布号	US3451502(A)	申请公布日期	1969.06.24
申请号	USD3451502	申请日期	1968.04.03
申请人	JACK P. BRANCH	发明人	JACK P. BRANCH;NOEL O. DURHAM
分类号	G10K11/04;(IPC1-7):H04R25/02	主分类号	G10K11/04
代理机构		代理人
主权项
地址

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