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经营范围
发明名称
Double door operator
摘要
申请公布号
US2670952(A)
申请公布日期
1954.03.02
申请号
US19500165755
申请日期
1950.06.02
申请人
ZELA K. PAGE
发明人
BUSHELL ELMER H.
分类号
E05F3/02
主分类号
E05F3/02
代理机构
代理人
主权项
地址
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