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发明名称
Signaling system
摘要
申请公布号
US2299822(A)
申请公布日期
1942.10.27
申请号
US19400327962
申请日期
1940.04.05
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
JR. ARTHUR W. HORTON,;MURPHY ORLANDO J.;VAUGHAN HENRY E.
分类号
H04Q1/453
主分类号
H04Q1/453
代理机构
代理人
主权项
地址
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