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发明名称
Elevator operator position-indicating device
摘要
申请公布号
US1775348(A)
申请公布日期
1930.09.09
申请号
US19290399751
申请日期
1929.10.15
申请人
JOHN JONES
发明人
JONES JOHN
分类号
B66B3/02
主分类号
B66B3/02
代理机构
代理人
主权项
地址
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