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发明名称
Counterbalance means for upwardly acting doors and the like
摘要
申请公布号
US2932057(A)
申请公布日期
1960.04.12
申请号
US19590815216
申请日期
1959.05.22
申请人
OVERHEAD DOOR CORPORATION
发明人
PEMBERTON PAUL E.
分类号
E05F1/16
主分类号
E05F1/16
代理机构
代理人
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地址
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