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发明名称
Key-hole guard
摘要
申请公布号
US1794481(A)
申请公布日期
1931.03.03
申请号
US19260094912
申请日期
1926.03.15
申请人
SHERMAN JOHN Q
发明人
SHERMAN JOHN Q.
分类号
E05B17/16
主分类号
E05B17/16
代理机构
代理人
主权项
地址
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