Method for forming a field structure for magnetic loudspeaker,申请号US19650473396-传众专利搜索

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发明名称	Method for forming a field structure for magnetic loudspeaker
摘要
申请公布号	US3367165(A)	申请公布日期	1968.02.06
申请号	US19650473396	申请日期	1965.07.20
申请人	ALDO L. COEN	发明人	COEN ALDO L.
分类号	B21D22/02;B21D51/00;H04R9/02	主分类号	B21D22/02
代理机构		代理人
主权项
地址

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