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发明名称
Private automatic telephone exchanges employing nonnumerical switches for interconnecting local lines, and for interconnecting local lines and trunk lines
摘要
申请公布号
US2486231(A)
申请公布日期
1949.10.25
申请号
US19450602231
申请日期
1945.06.29
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
VOSS JOHN H.
分类号
H04Q3/62
主分类号
H04Q3/62
代理机构
代理人
主权项
地址
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