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发明名称
Electromechanical amplifier
摘要
申请公布号
US2205227(A)
申请公布日期
1940.06.18
申请号
US19380189613
申请日期
1938.02.09
申请人
PERU RADIO LABORATORIES, INC.
发明人
SMITH HOWARD H.
分类号
H04R9/00;H04R23/02
主分类号
H04R9/00
代理机构
代理人
主权项
地址
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