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发明名称
Amplifying apparatus
摘要
申请公布号
US1932645(A)
申请公布日期
1933.10.31
申请号
US19320587120
申请日期
1932.01.16
申请人
THOMAS A. EDISON, INCORPORATED
发明人
SOMERS RICHARD M.
分类号
主分类号
代理机构
代理人
主权项
地址
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