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发明名称
Improvements in or relating to headsets
摘要
申请公布号
GB1133582(A)
申请公布日期
1968.11.13
申请号
GB19650026083
申请日期
1965.06.21
申请人
DENIS FERRANTI METERS LIMITED
发明人
MOORCROFT JOHN
分类号
H04M1/05
主分类号
H04M1/05
代理机构
代理人
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