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经营范围
发明名称
Hydropneumatic graduator
摘要
申请公布号
US2591087(A)
申请公布日期
1952.04.01
申请号
US19470733558
申请日期
1947.03.10
申请人
CLYDE C. JOHNSTON, JR.;GEORGE LEROY MILLICAN;EDWARD L. MILLICAN;MATTIE M. MILLICAN PHILLIPS
发明人
MILLICAN ROY E.
分类号
E21B43/38
主分类号
E21B43/38
代理机构
代理人
主权项
地址
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