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经营范围
发明名称
Improvements in or relating to pianos
摘要
申请公布号
GB477297(A)
申请公布日期
1937.12.24
申请号
GB19360017585
申请日期
1936.06.24
申请人
ALFRED EDWARD KNIGHT
发明人
分类号
G10C1/00
主分类号
G10C1/00
代理机构
代理人
主权项
地址
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