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发明名称
Signaling system
摘要
申请公布号
US2585545(A)
申请公布日期
1952.02.12
申请号
US19480059058
申请日期
1948.11.09
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
GANNETT DANFORTH K.
分类号
H03K3/45;H04M19/02
主分类号
H03K3/45
代理机构
代理人
主权项
地址
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