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发明名称
Doorcheck
摘要
申请公布号
US1851101(A)
申请公布日期
1932.03.29
申请号
US19310544845
申请日期
1931.06.16
申请人
OSCAR JOHNSON
发明人
JOHNSON OSCAR
分类号
E05B15/16;E05C17/54
主分类号
E05B15/16
代理机构
代理人
主权项
地址
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