Piezoelectric crystal unit,申请号US19480068222-传众专利搜索

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发明名称	Piezoelectric crystal unit
摘要
申请公布号	US2657320(A)	申请公布日期	1953.10.27
申请号	US19480068222	申请日期	1948.12.30
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	ZIEGLER ARTHUR W.
分类号	H03H3/02;H03H9/05	主分类号	H03H3/02
代理机构		代理人
主权项
地址

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