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发明名称
Signaling system
摘要
申请公布号
US2250922(A)
申请公布日期
1941.07.29
申请号
US19390271925
申请日期
1939.05.05
申请人
THE GAMEWELL COMPANY
发明人
WELD FOSTER E.
分类号
G08B25/00;G08B29/06;G08B29/16
主分类号
G08B25/00
代理机构
代理人
主权项
地址
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