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发明名称
Noise eliminator for telephone transmitters
摘要
申请公布号
US2425061(A)
申请公布日期
1947.08.05
申请号
US19430514475
申请日期
1943.12.16
申请人
HART HARRY J
发明人
HART HARRY J.
分类号
H04M1/19
主分类号
H04M1/19
代理机构
代理人
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