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经营范围
发明名称
TONE GENERATOR
摘要
申请公布号
GB8400858(D0)
申请公布日期
1984.02.15
申请号
GB19840000858
申请日期
1984.01.13
申请人
PLESSEY CO PLC
发明人
分类号
H04Q1/457;(IPC1-7):H04Q/
主分类号
H04Q1/457
代理机构
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