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经营范围
发明名称
CONFORMABLE SLIP
摘要
申请公布号
US3531836(A)
申请公布日期
1970.10.06
申请号
USD3531836
申请日期
1968.05.28
申请人
CHARLES D. CRICKMER
发明人
CHARLES D. CRICKMER
分类号
E21B23/01;E21B33/129;(IPC1-7):E21B31/02
主分类号
E21B23/01
代理机构
代理人
主权项
地址
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