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发明名称
Fingering indicator for keyboard musical instruments
摘要
申请公布号
US2820391(A)
申请公布日期
1958.01.21
申请号
US19550521276
申请日期
1955.07.11
申请人
JANSSEN PIANO CO., INC.
发明人
JANSSEN WEBSTER E.;MURDOCK PAUL F.
分类号
G09B15/08
主分类号
G09B15/08
代理机构
代理人
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地址
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