RIB EXTRACTOR WITH A STEERABLE DRILLING HEAD STRUCTURE,申请号USD3421796-传众专利搜索

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法人/股东/高管

发明名称	RIB EXTRACTOR WITH A STEERABLE DRILLING HEAD STRUCTURE
摘要
申请公布号	US3421796(A)	申请公布日期	1969.01.14
申请号	USD3421796	申请日期	1966.07.11
申请人	ARTHUR L. BARRETT	发明人	ARTHUR L. BARRETT
分类号	E21C31/10;E21C35/08;(IPC1-7):E21C1/02;E21C5/00;E21C37/04	主分类号	E21C31/10
代理机构		代理人
主权项
地址

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