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发明名称
Ventilating apparatus
摘要
申请公布号
US1798791(A)
申请公布日期
1931.03.31
申请号
US19280278565
申请日期
1928.05.17
申请人
GEORGE SCHMIDT, JR.
发明人
GROTHAUS GERHARD G.
分类号
F24F7/00
主分类号
F24F7/00
代理机构
代理人
主权项
地址
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