Piezoelectric crystal element,申请号US19480008678-传众专利搜索

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发明名称	Piezoelectric crystal element
摘要
申请公布号	US2483641(A)	申请公布日期	1949.10.04
申请号	US19480008678	申请日期	1948.02.16
申请人	THE BRUSH DEVELOPMENT COMPANY	发明人	JAFFE HANS
分类号	H03H9/02;H03H9/17	主分类号	H03H9/02
代理机构		代理人
主权项
地址

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