Obstruction device,申请号ZA19930006977-传众专利搜索

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发明名称	Obstruction device
摘要
申请公布号	ZA9306977(B)	申请公布日期	1994.04.18
申请号	ZA19930006977	申请日期	1993.09.21
申请人	WHITE, CORNELIUS JOHANNES;NIEUWOUDT, PHILIPPUS LOCHNER;MARAIS, ERNEST CHARLES;CILLIE, FREDERICK JOHANNES	发明人	CORNELIUS JOHANNES WHITE
分类号	E21B	主分类号	E21B
代理机构		代理人
主权项
地址

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