Improvements in or relating to electrostatic sound translating devices,申请号GB19310027160-传众专利搜索

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发明名称	Improvements in or relating to electrostatic sound translating devices
摘要
申请公布号	GB390175(A)	申请公布日期	1933.03.29
申请号	GB19310027160	申请日期	1931.09.29
申请人	ELECTRICAL RESEARCH PRODUCTS INC.	发明人
分类号	H04R19/04	主分类号	H04R19/04
代理机构		代理人
主权项
地址

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