Piezoelectric crystal apparatus,申请号GB19420004479-传众专利搜索

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发明名称	Piezoelectric crystal apparatus
摘要
申请公布号	GB553457(A)	申请公布日期	1943.05.21
申请号	GB19420004479	申请日期	1942.04.03
申请人	STANDARD TELEPHONES AND CABLES LIMITED	发明人
分类号	H03H9/00;H03H9/19;H03H9/56	主分类号	H03H9/00
代理机构		代理人
主权项
地址

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