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发明名称
Electronic amplifier control circuit
摘要
申请公布号
US2441840(A)
申请公布日期
1948.05.18
申请号
US19440555563
申请日期
1944.09.23
申请人
DICTAPHONE CORPORATION
发明人
PETRUSCHELL LUCIUS P.
分类号
H03G3/22;H04M1/215;H04M1/65
主分类号
H03G3/22
代理机构
代理人
主权项
地址
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