Dual crystal unit,申请号US19480014938-传众专利搜索

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发明名称	Dual crystal unit
摘要
申请公布号	US2456421(A)	申请公布日期	1948.12.14
申请号	US19480014938	申请日期	1948.03.15
申请人	PREMIER CRYSTAL LABORATORIES, INCORPORATED	发明人	JAHRLING ROBERT J.
分类号	H03H9/09	主分类号	H03H9/09
代理机构		代理人
主权项
地址

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