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经营范围
发明名称
Modulation system
摘要
申请公布号
US2238286(A)
申请公布日期
1941.04.15
申请号
US19390259721
申请日期
1939.03.04
申请人
LEO PUNGS
发明人
PUNGS LEO
分类号
H03C7/02
主分类号
H03C7/02
代理机构
代理人
主权项
地址
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