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发明名称
Adjustable extension device
摘要
申请公布号
US2581782(A)
申请公布日期
1952.01.08
申请号
US19490096839
申请日期
1949.06.03
申请人
ANDERSON IRVIN B
发明人
ANDERSON IRVIN B.
分类号
E06C7/44
主分类号
E06C7/44
代理机构
代理人
主权项
地址
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