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发明名称
Signaling system
摘要
申请公布号
US2168460(A)
申请公布日期
1939.08.08
申请号
US19350036649
申请日期
1935.08.17
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
WATSON GLENN W.
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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