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发明名称
Window sash counterbalance
摘要
申请公布号
US2262990(A)
申请公布日期
1941.11.18
申请号
US19390293268
申请日期
1939.09.02
申请人
发明人
CROSS GEORGE C.;DINSMORE DAWSON J.
分类号
E05D13/00
主分类号
E05D13/00
代理机构
代理人
主权项
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