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发明名称
Door type slip elevator
摘要
申请公布号
US2048208(A)
申请公布日期
1936.07.21
申请号
US19330660030
申请日期
1933.03.08
申请人
THE NATIONAL SUPERIOR COMPANY
发明人
YOUNG FORREST JOSEPH;WALTERS DANIEL WARD;TIMBS EDWARD
分类号
E21B19/07
主分类号
E21B19/07
代理机构
代理人
主权项
地址
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