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经营范围
发明名称
Pneumatic rock or coal drill
摘要
申请公布号
US2907303(A)
申请公布日期
1959.10.06
申请号
US19570678177
申请日期
1957.08.14
申请人
CHICAGO PNEUMATIC TOOL COMPANY
发明人
RITCHIE WILLIAM;STEPHEN CHARLES GORDON
分类号
E21B21/01;E21C37/24
主分类号
E21B21/01
代理机构
代理人
主权项
地址
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