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经营范围
发明名称
Safety tower
摘要
申请公布号
US1821376(A)
申请公布日期
1931.09.01
申请号
US19300435772
申请日期
1930.03.14
申请人
BROWN JOHN A
发明人
BROWN JOHN A.
分类号
F41H5/24
主分类号
F41H5/24
代理机构
代理人
主权项
地址
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