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发明名称
Electrical wave signaling system
摘要
申请公布号
US2520184(A)
申请公布日期
1950.08.29
申请号
US19450602453
申请日期
1945.06.30
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
ULLRICH EDWARD HILL
分类号
H01Q21/29
主分类号
H01Q21/29
代理机构
代理人
主权项
地址
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