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经营范围
发明名称
Telegraph system and apparatus for selective single or double channel operation
摘要
申请公布号
US2418928(A)
申请公布日期
1947.04.15
申请号
US19440561874
申请日期
1944.11.04
申请人
TELETYPE CORPORATION
发明人
GEMMEL WILBUR R.
分类号
H04L5/24
主分类号
H04L5/24
代理机构
代理人
主权项
地址
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