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经营范围
发明名称
Ladder jack
摘要
申请公布号
US3326507(A)
申请公布日期
1967.06.20
申请号
US19660518407
申请日期
1966.01.03
申请人
SEARS ROBERT L
发明人
SEARS ROBERT L.
分类号
E06C7/16
主分类号
E06C7/16
代理机构
代理人
主权项
地址
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