Cristaux piézoélectriques et leurs supports,申请号FRD820889-传众专利搜索

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发明名称	Cristaux piézoélectriques et leurs supports
摘要
申请公布号	FR820889(A)	申请公布日期	1937.11.20
申请号	FRD820889	申请日期	1937.04.21
申请人	LE MATERIEL TELEPHONIQUE	发明人
分类号	H03H3/04;H03H9/05;H03H9/09;H03H9/17;H03H9/19	主分类号	H03H3/04
代理机构		代理人
主权项
地址

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