BORE-HOLE GRAB,申请号PL19770200530-传众专利搜索

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法人/股东/高管

发明名称	BORE-HOLE GRAB
摘要
申请公布号	PL110090(B1)	申请公布日期	1980.06.30
申请号	PL19770200530	申请日期	1977.08.30
申请人		发明人
分类号	E21B;(IPC1-7):E21B31/02	主分类号	E21B
代理机构		代理人
主权项
地址

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