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发明名称
Wall and ceiling protector and ventilator
摘要
申请公布号
US2657626(A)
申请公布日期
1953.11.03
申请号
US19510234689
申请日期
1951.07.02
申请人
SONNTAG FRANCIS R
发明人
SONNTAG FRANCIS R.
分类号
F24F7/013
主分类号
F24F7/013
代理机构
代理人
主权项
地址
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