Piezo electric crystal holder,申请号US19290350094-传众专利搜索

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发明名称	Piezo electric crystal holder
摘要
申请公布号	US1870698(A)	申请公布日期	1932.08.09
申请号	US19290350094	申请日期	1929.03.26
申请人	WIRED RADIO, INC.	发明人	TROGNER ARTHUR M.
分类号	H03H9/05	主分类号	H03H9/05
代理机构		代理人
主权项
地址

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