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发明名称
Telephone dial attachment
摘要
申请公布号
US2416157(A)
申请公布日期
1947.02.18
申请号
US19450597776
申请日期
1945.06.06
申请人
LUCY COTTON
发明人
COTTON LUCY
分类号
H04M1/23
主分类号
H04M1/23
代理机构
代理人
主权项
地址
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