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经营范围
发明名称
Signaling system
摘要
申请公布号
US2685686(A)
申请公布日期
1954.08.03
申请号
US19520273450
申请日期
1952.02.26
申请人
THE GAMEWELL COMPANY
发明人
WELD FOSTER E.
分类号
G08B25/00
主分类号
G08B25/00
代理机构
代理人
主权项
地址
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