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发明名称
Sash balance
摘要
申请公布号
US2335816(A)
申请公布日期
1943.11.30
申请号
US19420425301
申请日期
1942.01.01
申请人
THE CALDWELL MANUFACTURING CO.
发明人
TAPPAN DEWITT
分类号
E05D13/00;E05F1/16
主分类号
E05D13/00
代理机构
代理人
主权项
地址
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