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发明名称
Method and means for producing loss varying with energy level
摘要
申请公布号
US1875156(A)
申请公布日期
1932.08.30
申请号
US19290374919
申请日期
1929.06.29
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
ROBERTS LELAND C.
分类号
H04B3/40
主分类号
H04B3/40
代理机构
代理人
主权项
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