Repetition lever of grand piano
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United States of America Patent
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Mar 16, 2010
Grant Date -
Jan 18, 2007
app pub date -
Oct 13, 2004
filing date -
Oct 14, 2003
priority date (Note) -
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Abstract
for reducing weight thereof. The long fibers for reinforcement are carbon fibers, and the thermoplastic resin is an ABS resin.
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