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经营范围
发明名称
Concealed unit for heating and ventilating
摘要
申请公布号
US1782711(A)
申请公布日期
1930.11.25
申请号
US19250010715
申请日期
1925.02.20
申请人
CALLAHAN MICHAEL J
发明人
CALLAHAN MICHAEL J.
分类号
F28D1/02
主分类号
F28D1/02
代理机构
代理人
主权项
地址
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