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经营范围
发明名称
Deep well screen
摘要
申请公布号
US2310507(A)
申请公布日期
1943.02.09
申请号
US19400366532
申请日期
1940.11.22
申请人
EDWARD E. JOHNSON, INCORPORATED
发明人
JR. CHARLES E. BODEY,
分类号
E21B43/08
主分类号
E21B43/08
代理机构
代理人
主权项
地址
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