Cristal piézoélectrique perfectionné,申请号FRD680816-传众专利搜索

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发明名称	Cristal piézoélectrique perfectionné
摘要
申请公布号	FR680816(A)	申请公布日期	1930.05.06
申请号	FRD680816	申请日期	1929.08.26
申请人	KOLSTER-BRANDES LIMITED	发明人
分类号	H03H3/02;H03H9/02;H03H9/17	主分类号	H03H3/02
代理机构		代理人
主权项
地址

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