INVALID BALLOT DETECTOR,申请号USD3542287-传众专利搜索

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发明名称	INVALID BALLOT DETECTOR
摘要
申请公布号	US3542287(A)	申请公布日期	1970.11.24
申请号	USD3542287	申请日期	1968.08.02
申请人	RICHARD A. SCHENA;DAVID MARGARETOS	发明人	RICHARD A. SCHENA;DAVID MARGARETOS
分类号	G06K17/00;(IPC1-7):G06K5/00;G09B7/06	主分类号	G06K17/00
代理机构		代理人
主权项
地址

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