Improved electrodynamic device for translating electric oscillations into acoustic vibrations and conversely,申请号GB19310012421-传众专利搜索

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发明名称	Improved electrodynamic device for translating electric oscillations into acoustic vibrations and conversely
摘要
申请公布号	GB387309(A)	申请公布日期	1933.02.02
申请号	GB19310012421	申请日期	1931.04.27
申请人	N. V. PHILIPS' GLOEILAMPENFABRIEKEN	发明人
分类号	H04R9/04	主分类号	H04R9/04
代理机构		代理人
主权项
地址

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