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经营范围
发明名称
Dial impulse recorder
摘要
申请公布号
US2495769(A)
申请公布日期
1950.01.31
申请号
US19470732040
申请日期
1947.03.03
申请人
REEVES CLARENCE E
发明人
REEVES CLARENCE E.
分类号
H04M1/56;H04M1/65;H04M15/30
主分类号
H04M1/56
代理机构
代理人
主权项
地址
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