Improvements in and relating to piezo-electric crystal devices,申请号GB19350005347-传众专利搜索

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发明名称	Improvements in and relating to piezo-electric crystal devices
摘要
申请公布号	GB429992(A)	申请公布日期	1935.06.11
申请号	GB19350005347	申请日期	1935.02.19
申请人	THE BRITISH THOMSON-HOUSTON COMPANY, LIMITED	发明人
分类号	H03H9/05	主分类号	H03H9/05
代理机构		代理人
主权项
地址

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