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发明名称
Audio-frequency amplifier
摘要
申请公布号
US2563773(A)
申请公布日期
1951.08.07
申请号
US19460687058
申请日期
1946.07.30
申请人
SONOTONE CORPORATION
发明人
CROWNOVER JOSEPH W.;KOREN HEIMAN W.
分类号
H03F1/04;H04R25/00
主分类号
H03F1/04
代理机构
代理人
主权项
地址
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