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发明名称
Piano touch instructor apparatus
摘要
申请公布号
US3334535(A)
申请公布日期
1967.08.08
申请号
US19660572996
申请日期
1966.08.17
申请人
WITHERS LOREN R
发明人
WITHERS LOREN R.
分类号
G09B15/06
主分类号
G09B15/06
代理机构
代理人
主权项
地址
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