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发明名称
Wireless signaling system
摘要
申请公布号
US1989770(A)
申请公布日期
1935.02.05
申请号
US19320611546
申请日期
1932.05.16
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
REEVES ALEC HARLEY
分类号
H04B1/68;H04L27/02
主分类号
H04B1/68
代理机构
代理人
主权项
地址
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