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发明名称
Keyboard attachment for electrically operated musical instruments
摘要
申请公布号
US2779225(A)
申请公布日期
1957.01.29
申请号
US19530358878
申请日期
1953.06.01
申请人
EMIL CARLSON
发明人
CARLSON EMIL
分类号
G10D15/00
主分类号
G10D15/00
代理机构
代理人
主权项
地址
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