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发明名称
METHOD AND APPARATUS FOR COMMUNICATING AUDIO FREQUENCY INFORMATION
摘要
申请公布号
GB2100091(B)
申请公布日期
1985.02.06
申请号
GB19820010817
申请日期
1982.04.14
申请人
EECO INC
发明人
分类号
H04J99/00;H04N7/00;H04N7/08;H04N7/081;(IPC1-7):H04N7/00
主分类号
H04J99/00
代理机构
代理人
主权项
地址
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