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经营范围
发明名称
Impulse transmitter
摘要
申请公布号
US2107988(A)
申请公布日期
1938.02.08
申请号
US19350042406
申请日期
1935.09.27
申请人
INVENTOR TRUST S. A.
发明人
KARDORFF LEON
分类号
H04M1/274
主分类号
H04M1/274
代理机构
代理人
主权项
地址
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