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经营范围
发明名称
Signaling system and apparatus
摘要
申请公布号
US2050404(A)
申请公布日期
1936.08.11
申请号
US19330656288
申请日期
1933.02.11
申请人
THE GAMEWELL COMPANY
发明人
WELD FOSTER E.
分类号
G08B25/04
主分类号
G08B25/04
代理机构
代理人
主权项
地址
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