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发明名称
Apparat til Lydoptagelse og Lydgengivelse ved Hjælp af paa Spolesæt anbragte Lydbærere.
摘要
申请公布号
DK61860(C)
申请公布日期
1944.01.31
申请号
DKD61860
申请日期
1940.01.11
申请人
DR. WILHELM FRICK
发明人
DR. WILHELM FRICK
分类号
主分类号
代理机构
代理人
主权项
地址
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