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发明名称
System for producing telegraph signals
摘要
申请公布号
US2260906(A)
申请公布日期
1941.10.28
申请号
US19370180146
申请日期
1937.12.16
申请人
ERICH HUDEC
发明人
HUDEC ERICH
分类号
H03K7/08
主分类号
H03K7/08
代理机构
代理人
主权项
地址
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