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发明名称
Mechanical impedance device
摘要
申请公布号
US1784830(A)
申请公布日期
1930.12.16
申请号
US19280302123
申请日期
1928.08.25
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
FLANDERS PAUL B.
分类号
H03H9/50
主分类号
H03H9/50
代理机构
代理人
主权项
地址
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