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发明名称
Tone detection process and device for implementing said process
摘要
申请公布号
US4782523(A)
申请公布日期
1988.11.01
申请号
US19870043053
申请日期
1987.04.27
申请人
INTERNATIONAL BUSINESS MACHINES CORP.
发明人
GALAND, CLAUDE;ROULIER, GUY;VERMOT-GAUCHY, ROBERT;CERF-DANON, HELENE
分类号
H04L27/00;H04L27/26;H04Q1/457;(IPC1-7):H04M1/00
主分类号
H04L27/00
代理机构
代理人
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