Grand piano action
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 21, 2003
Grant Date -
N/A
app pub date -
Jun 8, 2000
filing date -
Jun 8, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improvement for a conventional grand piano action to position a piano hammer at varying at rest positions to evoke varying intensities of sound with an unvarying strength of piano key touch.
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