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发明名称	Sign
摘要
申请公布号	US2142633(A)	申请公布日期	1939.01.03
申请号	US19370167258	申请日期	1937.10.04
申请人	LE ROY H. DEY;ROBERT L. PIOSO	发明人	DEY LE ROY H.;PIOSO ROBERT L.
分类号	G09F13/30	主分类号	G09F13/30
代理机构		代理人
主权项
地址

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