Rotatable display sign,申请号US19490132016-传众专利搜索

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发明名称	Rotatable display sign
摘要
申请公布号	US2593331(A)	申请公布日期	1952.04.15
申请号	US19490132016	申请日期	1949.12.09
申请人	MORTON RICHARD N	发明人	MORTON RICHARD N.
分类号	G09F13/34	主分类号	G09F13/34
代理机构		代理人
主权项
地址

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