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发明名称
Condition-responsive apparatus for calling preselected telephone numbers
摘要
申请公布号
US2542880(A)
申请公布日期
1951.02.20
申请号
US19470734382
申请日期
1947.03.13
申请人
MICHELE RAVERA
发明人
RAVERA MICHELE
分类号
H04M1/272;H04M11/04
主分类号
H04M1/272
代理机构
代理人
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地址
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