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发明名称
Telephone dial recording device
摘要
申请公布号
US2518859(A)
申请公布日期
1950.08.15
申请号
US19470787044
申请日期
1947.11.20
申请人
BENNIS WILLIAM J
发明人
BENNIS WILLIAM J.
分类号
H04M1/56
主分类号
H04M1/56
代理机构
代理人
主权项
地址
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