Sport racket strings with hollow center core
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United States of America Patent
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Jun 16, 2009
Issued Date -
N/A
app pub date -
Aug 2, 2005
filing date -
Aug 2, 2005
priority date (Note) -
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Abstract
A string for sport rackets includes a center core having at least one first hollow portion extending in an axial direction of the center core and at least one layer wrapped around the center core. The at least one layer is composed of a plurality of first periderm wires which are spirally or alternatively wrapped on the center core.
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