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经营范围
发明名称
Slip handle
摘要
申请公布号
US3268968(A)
申请公布日期
1966.08.30
申请号
US19640412528
申请日期
1964.11.19
申请人
JOY MANUFACTURING COMPANY
发明人
CRICKMER CHARLES D.
分类号
E21B19/10
主分类号
E21B19/10
代理机构
代理人
主权项
地址
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