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发明名称
Verbesserungen für DTMF Signalisierung
摘要
申请公布号
DE60231384(D1)
申请公布日期
2009.04.16
申请号
DE20026031384
申请日期
2002.07.05
申请人
HEWLETT-PACKARD CO.(A DELAWARE CORPORATION)
发明人
SAUVAGE, PIERRE;BRANDT, MARC;HYERLE, ROBERT
分类号
H04M1/50;H04M3/493;H04Q1/45
主分类号
H04M1/50
代理机构
代理人
主权项
地址
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