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发明名称
Elevator device
摘要
申请公布号
US2354217(A)
申请公布日期
1944.07.25
申请号
US19410422224
申请日期
1941.12.09
申请人
BYRON JACKSON CO.
发明人
MULLINIX GIRD E.;HAMBLY ALLEN E.
分类号
E21B19/06
主分类号
E21B19/06
代理机构
代理人
主权项
地址
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