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发明名称
Anti-germ cap for telephone earpieces and mouthpieces
摘要
申请公布号
GB667161(A)
申请公布日期
1952.02.27
申请号
GB19470033262
申请日期
1950.06.03
申请人
JOHN HENRY DUNN
发明人
分类号
H04R1/12
主分类号
H04R1/12
代理机构
代理人
主权项
地址
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