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发明名称
Door control apparatus
摘要
申请公布号
US2422770(A)
申请公布日期
1947.06.24
申请号
US19440566127
申请日期
1944.12.01
申请人
CHASE BLUM
发明人
BLUM CHASE
分类号
E05B65/00;E05F11/00
主分类号
E05B65/00
代理机构
代理人
主权项
地址
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