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发明名称
Telegraph apparatus
摘要
申请公布号
US1928967(A)
申请公布日期
1933.10.03
申请号
US19320645887
申请日期
1932.12.06
申请人
WARD GILBERT ROSWELL
发明人
GILBERT ROSWELL WARD
分类号
H04L15/08
主分类号
H04L15/08
代理机构
代理人
主权项
地址
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