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发明名称
Device for producing periodical current impulses
摘要
申请公布号
US2038960(A)
申请公布日期
1936.04.28
申请号
US19340755240
申请日期
1934.11.28
申请人
DR. EUGEN OSTWALD
发明人
SCHATTANIK HEINRICH
分类号
H02M1/22
主分类号
H02M1/22
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代理人
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