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经营范围
发明名称
Half-duplex speakerphone.
摘要
申请公布号
EP0364383(B1)
申请公布日期
1994.11.30
申请号
EP19890480136
申请日期
1989.09.12
申请人
ROLM COMPANY
发明人
ARBEL, YGAL
分类号
H04M1/60;H04B3/20;H04M9/08;H04M9/10;(IPC1-7):H04M9/08
主分类号
H04M1/60
代理机构
代理人
主权项
地址
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