EDUCATIONAL DEVICE HAVING TRANSPARENT ERASABLE SURFACE AND MOVABLE ILLUSTRATION STRIP POSITIONED BENEATH SAID WRITING SURFACE,申请号CAD603372-传众专利搜索

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发明名称	EDUCATIONAL DEVICE HAVING TRANSPARENT ERASABLE SURFACE AND MOVABLE ILLUSTRATION STRIP POSITIONED BENEATH SAID WRITING SURFACE
摘要
申请公布号	CA603372(A)	申请公布日期	1960.08.16
申请号	CAD603372	申请日期
申请人	CHARLOTTE C. ORTEGA	发明人	CHARLOTTE C. ORTEGA
分类号		主分类号
代理机构		代理人
主权项
地址

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