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发明名称
Telephone dials
摘要
申请公布号
US2808668(A)
申请公布日期
1957.10.08
申请号
US19560609258
申请日期
1956.09.11
申请人
CHRISTIN MANUEL D
发明人
CHRISTIN MANUEL D.
分类号
H04M1/22
主分类号
H04M1/22
代理机构
代理人
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