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发明名称
Combination safety brace and door operator
摘要
申请公布号
US2674486(A)
申请公布日期
1954.04.06
申请号
US19530355441
申请日期
1953.05.18
申请人
ALDERFER STERLING W
发明人
ALDERFER STERLING W.
分类号
E05B65/12
主分类号
E05B65/12
代理机构
代理人
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