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发明名称
Signaling system
摘要
申请公布号
US1871457(A)
申请公布日期
1932.08.16
申请号
US19270174449
申请日期
1927.03.11
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
LOMAX CLARENCE 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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