A self-instructional, self-recording and self-scoring device,申请号GB19570028427-传众专利搜索

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发明名称	A self-instructional, self-recording and self-scoring device
摘要
申请公布号	GB858194(A)	申请公布日期	1961.01.11
申请号	GB19570028427	申请日期	1957.09.09
申请人	VAN VALKENBURGH, NOOGER & NEVILLE, INC.	发明人
分类号	G09B3/08	主分类号	G09B3/08
代理机构		代理人
主权项
地址

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