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发明名称
Door opener
摘要
申请公布号
US2567684(A)
申请公布日期
1951.09.11
申请号
US19490092215
申请日期
1949.05.09
申请人
TUCKEY CHARLES L
发明人
TUCKEY CHARLES L.
分类号
E05F1/10
主分类号
E05F1/10
代理机构
代理人
主权项
地址
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