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经营范围
发明名称
Electric signaling
摘要
申请公布号
US2281441(A)
申请公布日期
1942.04.28
申请号
US19410375202
申请日期
1941.01.21
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
JR. ARTHUR W. HORTON,;MOHR MILTON E.
分类号
H03K5/1536;H04Q3/00
主分类号
H03K5/1536
代理机构
代理人
主权项
地址
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