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发明名称
Telephone dial operating device
摘要
申请公布号
US2510920(A)
申请公布日期
1950.06.06
申请号
US19470739818
申请日期
1947.04.07
申请人
WORMINGTON MABEL L
发明人
WORMINGTON MABEL L.
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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