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发明名称
Improvements in and relating to reproducing magnets for telegraphones
摘要
申请公布号
GB319680(A)
申请公布日期
1930.07.09
申请号
GB19290010930
申请日期
1929.04.09
申请人
CURT STILLE
发明人
分类号
G11B5/54;G11B15/60
主分类号
G11B5/54
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代理人
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