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发明名称
Fire escape
摘要
申请公布号
US2249897(A)
申请公布日期
1941.07.22
申请号
US19400358534
申请日期
1940.09.26
申请人
HAMMILL EDWARD C
发明人
HAMMILL EDWARD C.
分类号
A62B1/20
主分类号
A62B1/20
代理机构
代理人
主权项
地址
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