Map projections demonstrator,申请号US19560559494-传众专利搜索

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发明名称	Map projections demonstrator
摘要
申请公布号	US2932907(A)	申请公布日期	1960.04.19
申请号	US19560559494	申请日期	1956.01.16
申请人	STIEBER JOSEPH A;WELDON JOHN B	发明人	STIEBER JOSEPH A.;WELDON JOHN B.
分类号	G09B27/08	主分类号	G09B27/08
代理机构		代理人
主权项
地址

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