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经营范围
发明名称
Chromatische Klaviatur
摘要
申请公布号
DE809987(C)
申请公布日期
1951.08.06
申请号
DE1949K000382
申请日期
1949.11.01
申请人
KARCHER GUSTAV
发明人
KARCHER GUSTAV
分类号
G10C3/12
主分类号
G10C3/12
代理机构
代理人
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