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经营范围
发明名称
Casing scraper
摘要
申请公布号
US2667930(A)
申请公布日期
1954.02.02
申请号
US19480019396
申请日期
1948.04.06
申请人
BAKER OIL TOOLS, INC.
发明人
SAURENMAN DEAN F.;HILTON PAUL E.
分类号
E21B37/02
主分类号
E21B37/02
代理机构
代理人
主权项
地址
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