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发明名称
Automatic door bottom
摘要
申请公布号
US2282019(A)
申请公布日期
1942.05.05
申请号
US19390288823
申请日期
1939.08.07
申请人
W. J. DENNIS & COMPANY
发明人
BALOUSEK WILLIAM E.
分类号
E06B7/20
主分类号
E06B7/20
代理机构
代理人
主权项
地址
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