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发明名称
NIPPEL.
摘要
申请公布号
NO157791(B)
申请公布日期
1988.02.08
申请号
NO19790003631
申请日期
1979.11.12
申请人
OTIS ENGINEERING CORPORATION
发明人
FISHER, ERNEST P. JR.;YONKER, JOHN H.;BILLS, DAVID
分类号
E21B34/00;E21B34/10;(IPC1-7):E21B34/10
主分类号
E21B34/00
代理机构
代理人
主权项
地址
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