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发明名称
Window opener
摘要
申请公布号
US2738953(A)
申请公布日期
1956.03.20
申请号
US19540409160
申请日期
1954.02.09
申请人
FEITIG HENRY G
发明人
FEITIG HENRY G.
分类号
E04G23/00
主分类号
E04G23/00
代理机构
代理人
主权项
地址
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