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发明名称
Signaling system
摘要
申请公布号
US1911949(A)
申请公布日期
1933.05.30
申请号
US19290405780
申请日期
1929.11.08
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
GOULD ROY F.
分类号
G08C19/18
主分类号
G08C19/18
代理机构
代理人
主权项
地址
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