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经营范围
发明名称
PIPE SPRAYING DEVICE
摘要
申请公布号
US3475781(A)
申请公布日期
1969.11.04
申请号
USD3475781
申请日期
1967.01.03
申请人
BYRON JACKSON INC.
发明人
JOHN C. GRANT
分类号
E21B33/03;E21B41/02;(IPC1-7):E21B33/03;E21B41/00
主分类号
E21B33/03
代理机构
代理人
主权项
地址
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