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发明名称
WELL SEALS
摘要
申请公布号
US3503635(A)
申请公布日期
1970.03.31
申请号
USD3503635
申请日期
1968.08.28
申请人
JESS & LOWELL WELL CASING CO.
发明人
LOWELL K. CHEATWOOD;JESS A. POINDEXTER
分类号
F16J15/02;(IPC1-7):F16L21/04
主分类号
F16J15/02
代理机构
代理人
主权项
地址
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