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发明名称
Hinged ventilator of the hopper type
摘要
申请公布号
US2153508(A)
申请公布日期
1939.04.04
申请号
US19370123667
申请日期
1937.02.02
申请人
FREDERICK BRABY & COMPANY LIMITED
发明人
MARCHBANK JOHN
分类号
E06B7/06
主分类号
E06B7/06
代理机构
代理人
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地址
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