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经营范围
发明名称
System of signaling and repeater therefor
摘要
申请公布号
US1867976(A)
申请公布日期
1932.07.19
申请号
US19240687774
申请日期
1924.01.22
申请人
TELETYPE CORPORATION
发明人
KLEINSCHMIDT EDWARD E.
分类号
H04L25/20
主分类号
H04L25/20
代理机构
代理人
主权项
地址
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