Four way blackboard,申请号GB19980014602-传众专利搜索

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发明名称	Four way blackboard
摘要
申请公布号	GB9814602(D0)	申请公布日期	1998.09.02
申请号	GB19980014602	申请日期	1998.07.03
申请人	MITCHELL, LORRAINE E	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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