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经营范围
发明名称
Circuits for relaying or amplifying direct or alternating current energy
摘要
申请公布号
US1953775(A)
申请公布日期
1934.04.03
申请号
US19310563834
申请日期
1931.09.19
申请人
GENERAL ELECTRIC COMPANY
发明人
ROBINSON ERNEST YEOMAN
分类号
H03F1/50;H03F3/32
主分类号
H03F1/50
代理机构
代理人
主权项
地址
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