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发明名称
Adjustable spring sash balance
摘要
申请公布号
US2774100(A)
申请公布日期
1956.12.18
申请号
US19520307232
申请日期
1952.08.30
申请人
UNIQUE BALANCE CO., INC.
发明人
LARSON ALGOT;SMITH HOWARD A.
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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