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发明名称
Signaling system
摘要
申请公布号
US1813961(A)
申请公布日期
1931.07.14
申请号
US19250052989
申请日期
1925.08.28
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
SCHELLENG JOHN C.
分类号
H01Q21/06
主分类号
H01Q21/06
代理机构
代理人
主权项
地址
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