Visual aid teaching device,申请号US19660558895-传众专利搜索

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发明名称	Visual aid teaching device
摘要
申请公布号	US3364604(A)	申请公布日期	1968.01.23
申请号	US19660558895	申请日期	1966.06.20
申请人	QUINTON M. LOCKE	发明人	DONALDSON TOMMIE C.;WORTHY JOHN W.
分类号	G09B5/02;G09F11/295	主分类号	G09B5/02
代理机构		代理人
主权项
地址

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