发明名称 Piano tuning wrench
摘要 An improved piano tuning hammer for use by piano technicians, that allows dramatically increased tuning accuracy, ease of use, and speed. The improved tuning hammer is comprised of relatively large cross-sections. The improved tuning hammer may be comprised of lightweight materials. The relatively large cross-sections provide increased stiffness, which serves to increase the effectiveness of the tuning process.
申请公布号 US7638702(B2) 申请公布日期 2009.12.29
申请号 US20040004215 申请日期 2004.12.03
申请人 FUJAN STEVEN J 发明人 FUJAN STEVEN J.
分类号 G10G7/00 主分类号 G10G7/00
代理机构 代理人
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