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经营范围
发明名称
Apparat zur Erläuterung der Tonleitern.
摘要
申请公布号
CH186872(A)
申请公布日期
1936.10.15
申请号
CHD186872
申请日期
1936.02.21
申请人
MARTIN,ALBERT
发明人
MARTIN,ALBERT
分类号
G09B15/02
主分类号
G09B15/02
代理机构
代理人
主权项
地址
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