发明名称 |
Piano key leveling device and method |
摘要 |
A keyboard musical instrument includes a key, a balance rail, and a key leveling tab. The key leveling tab is permanently mounted on the balance rail. The key leveling tab is non-resonating and has a varying thickness.
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申请公布号 |
US7683248(B2) |
申请公布日期 |
2010.03.23 |
申请号 |
US20070986766 |
申请日期 |
2007.11.26 |
申请人 |
RAWSON CHRISTOPHER RICHARD |
发明人 |
RAWSON CHRISTOPHER RICHARD |
分类号 |
G10C3/12 |
主分类号 |
G10C3/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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