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发明名称
Impulse transmitting system
摘要
申请公布号
US2136984(A)
申请公布日期
1938.11.15
申请号
US19370136928
申请日期
1937.04.14
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
SMITH CHAUNCEY WEBB
分类号
H04L25/04;H04L25/06
主分类号
H04L25/04
代理机构
代理人
主权项
地址
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