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经营范围
发明名称
Interlocking device
摘要
申请公布号
US2043440(A)
申请公布日期
1936.06.09
申请号
US19340740262
申请日期
1934.08.17
申请人
LITTLEFIELD HENRY S
发明人
LITTLEFIELD HENRY S.
分类号
E04F13/08
主分类号
E04F13/08
代理机构
代理人
主权项
地址
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