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发明名称
CHORD INDICATOR FOR INSTRUMENTS HAVING ORGAN AND PIANO-TYPE KEYBOARDS
摘要
申请公布号
CA1033162(A)
申请公布日期
1978.06.20
申请号
CA19760250105
申请日期
1976.04.12
申请人
GREEN, HARRY
发明人
GREEN, HARRY
分类号
主分类号
代理机构
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