MATHEMATICAL TEACHING AID,申请号USD3464123-传众专利搜索

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发明名称	MATHEMATICAL TEACHING AID
摘要
申请公布号	US3464123(A)	申请公布日期	1969.09.02
申请号	USD3464123	申请日期	1967.04.17
申请人	DAMON ENG. INC.	发明人	CARL R. HURTIG
分类号	G09B19/02;(IPC1-7):G09B23/02	主分类号	G09B19/02
代理机构		代理人
主权项
地址

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