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经营范围
发明名称
Device for sealing flowing wells and stopping the engines
摘要
申请公布号
US1836507(A)
申请公布日期
1931.12.15
申请号
US19270232750
申请日期
1927.11.12
申请人
RASMUSSEN CHESTER A;TROUT WILLIAM A
发明人
RASMUSSEN CHESTER A.;TROUT WILLIAM A.
分类号
E21B33/06
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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