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经营范围
发明名称
Automatic telegraph switching
摘要
申请公布号
US2599988(A)
申请公布日期
1952.06.10
申请号
US19500158790
申请日期
1950.04.28
申请人
TELETYPE CORPORATION
发明人
HALVORSEN RALPH H.
分类号
H04L12/54
主分类号
H04L12/54
代理机构
代理人
主权项
地址
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