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经营范围
发明名称
Window ventilator for warming incoming air
摘要
申请公布号
US2561928(A)
申请公布日期
1951.07.24
申请号
US19470750960
申请日期
1947.05.28
申请人
STEWART JOHNSTON LILLIAN
发明人
JOHNSTON LILLIAN STEWART
分类号
E06B7/03
主分类号
E06B7/03
代理机构
代理人
主权项
地址
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