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发明名称
Electric signaling
摘要
申请公布号
US2280949(A)
申请公布日期
1942.04.28
申请号
US19410375200
申请日期
1941.01.21
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HALL NATHAN I.
分类号
H03K3/37;H03K3/55;H04Q3/00
主分类号
H03K3/37
代理机构
代理人
主权项
地址
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