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经营范围
发明名称
Telegraph system
摘要
申请公布号
US1795652(A)
申请公布日期
1931.03.10
申请号
US19290397177
申请日期
1929.10.04
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
KINKEAD FULLERTON S.
分类号
H04L12/40
主分类号
H04L12/40
代理机构
代理人
主权项
地址
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