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发明名称
Key guard
摘要
申请公布号
US1808141(A)
申请公布日期
1931.06.02
申请号
US19310513914
申请日期
1931.02.06
申请人
KUPFER THEODORE W
发明人
KUPFER THEODORE W.
分类号
E05B13/04
主分类号
E05B13/04
代理机构
代理人
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