Music – Accessories – Tuning devices
Reexamination Certificate
2004-12-03
2009-12-29
Qin, Jianchun (Department: 2832)
Music
Accessories
Tuning devices
C081S022000
Reexamination Certificate
active
07638702
ABSTRACT:
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.
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Head, Johnson & Kachigan PC
Qin Jianchun
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