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经营范围
发明名称
Tone control
摘要
申请公布号
US2680231(A)
申请公布日期
1954.06.01
申请号
US19500137397
申请日期
1950.01.07
申请人
GENERAL PRECISION LABORATORY INCORPORATED
发明人
JR. HARRY J. REED,
分类号
H03G5/06
主分类号
H03G5/06
代理机构
代理人
主权项
地址
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