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发明名称
ROTATING FLAPPER ELEVATOR
摘要
申请公布号
US3588162(A)
申请公布日期
1971.06.28
申请号
USD3588162
申请日期
1969.07.22
申请人
BYRON JACKSON INC.
发明人
TAYLOR L. JONES;JOHN W. TURNER JR.
分类号
E21B19/06;(IPC1-7):E21B19/00
主分类号
E21B19/06
代理机构
代理人
主权项
地址
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