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发明名称
PACKER
摘要
申请公布号
US3525393(A)
申请公布日期
1970.08.25
申请号
USD3525393
申请日期
1968.11.18
申请人
FENIX & SCISSON INC.
发明人
JAMES H. COBBS;ALBERT K. KLINE
分类号
E21B33/128;(IPC1-7):E21B23/06;E21B33/14
主分类号
E21B33/128
代理机构
代理人
主权项
地址
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