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发明名称
Recorder amplifier
摘要
申请公布号
US2688729(A)
申请公布日期
1954.09.07
申请号
US19490107162
申请日期
1949.07.28
申请人
OFFNER FRANKLIN F
发明人
OFFNER FRANKLIN F.
分类号
H03F3/40
主分类号
H03F3/40
代理机构
代理人
主权项
地址
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