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发明名称
PIANO AND ORGAN KEYBOARDS AND FRAMES
摘要
申请公布号
CA720630(A)
申请公布日期
1965.11.02
申请号
CAD720630
申请日期
申请人
BRITISH PIANO ACTIONS LIMITED
发明人
ARTHUR E. VICKERS
分类号
主分类号
代理机构
代理人
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