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发明名称
Audible telephonic line identification
摘要
申请公布号
US2499776(A)
申请公布日期
1950.03.07
申请号
US19460672467
申请日期
1946.05.27
申请人
TELETYPE CORPORATION
发明人
POTTS MARTHA W. C.
分类号
H04M3/64;H04M15/08
主分类号
H04M3/64
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