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经营范围
发明名称
Selective signaling generator in which coded information is recorded on a magnetizable medium
摘要
申请公布号
US2558187(A)
申请公布日期
1951.06.26
申请号
US19490133191
申请日期
1949.12.15
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
MARRISON WARREN A.
分类号
H04M1/276
主分类号
H04M1/276
代理机构
代理人
主权项
地址
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