Acoustic tone equalizer,申请号US19570701425-传众专利搜索

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法人/股东/高管

发明名称	Acoustic tone equalizer
摘要
申请公布号	US2891629(A)	申请公布日期	1959.06.23
申请号	US19570701425	申请日期	1957.12.09
申请人	MERCURIUS RANDOLPH P	发明人	MERCURIUS RANDOLPH P.
分类号	H04R1/28	主分类号	H04R1/28
代理机构		代理人
主权项
地址

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