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发明名称
Telegraph instrument
摘要
申请公布号
US1834076(A)
申请公布日期
1931.12.01
申请号
US19300428875
申请日期
1930.02.17
申请人
RADIO CORPORATION
发明人
SMALE JOHN ARTHUR
分类号
H04L13/06
主分类号
H04L13/06
代理机构
代理人
主权项
地址
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