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发明名称
Impulse sender
摘要
申请公布号
US2273550(A)
申请公布日期
1942.02.17
申请号
US19380210042
申请日期
1938.05.25
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
ZAPF GEORG
分类号
H04M1/272
主分类号
H04M1/272
代理机构
代理人
主权项
地址
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