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发明名称
Telephone exclusion key
摘要
申请公布号
US2946856(A)
申请公布日期
1960.07.26
申请号
US19580738476
申请日期
1958.05.28
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
WOOD FREDRIC E.
分类号
H04M1/667
主分类号
H04M1/667
代理机构
代理人
主权项
地址
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