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发明名称
Communication system
摘要
申请公布号
US2224250(A)
申请公布日期
1940.12.10
申请号
US19370174468
申请日期
1937.11.13
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
BORGESON CARL ANDERS;CARTER FRANK J.;DRAKE GEORGE ROBERT;GROOME PRESTON EDMUND;HANLEY FRANK HAROLD
分类号
H04J3/16;H04L5/22
主分类号
H04J3/16
代理机构
代理人
主权项
地址
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