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发明名称
Sanitary telephone device
摘要
申请公布号
US1784700(A)
申请公布日期
1930.12.09
申请号
US19290389257
申请日期
1929.08.29
申请人
CARL MILLER
发明人
MILLER CARL
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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