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经营范围
发明名称
KEYSEAT WIPER
摘要
申请公布号
US3431990(A)
申请公布日期
1969.03.11
申请号
USD3431990
申请日期
1967.02.02
申请人
HOUSTON ENG. INC.
发明人
DERREL D. WEBB
分类号
E21B10/26;E21B31/107;(IPC1-7):E21B1/06;E21B1/10;E21B5/00
主分类号
E21B10/26
代理机构
代理人
主权项
地址
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