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发明名称
Frequency modulation
摘要
申请公布号
US2312977(A)
申请公布日期
1943.03.02
申请号
US19400359514
申请日期
1940.10.03
申请人
ELECTRIC & MUSICAL INDUSTRIES LIMITED
发明人
PERCIVAL WILLIAM SPENCER
分类号
H03C3/24;H03C3/26;H04N7/045
主分类号
H03C3/24
代理机构
代理人
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地址
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