Educational testing device,申请号US19630292875-传众专利搜索

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发明名称	Educational testing device
摘要
申请公布号	US3166860(A)	申请公布日期	1965.01.26
申请号	US19630292875	申请日期	1963.07.05
申请人	DELANEY JR LAWRENCE J	发明人	JR. LAWRENCE J. DELANEY,
分类号	G09B3/06	主分类号	G09B3/06
代理机构		代理人
主权项
地址

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