Matrix composite golf club shaft and mandrel

Games using tangible projectile – Golf – Club or club support

Reexamination Certificate

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Reexamination Certificate

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07862447

ABSTRACT:
A golf club shaft is provided that has a grip end opposite a head end and defining a length of the shaft extending between those two ends. The shaft has a tubular cross-section over at least one portion of the shaft length which cross-section has a substantially circular outer periphery and a polygon inner periphery formed of a plurality of between 4 and 24 flats, and preferably formed of 8-16 flats. A mandrel having the shape of the inner periphery of the shaft is also provided, as is a method of forming the shaft that uses the mandrel and composite matrix materials.

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patent: 2001000607 (2001-01-01), None
English translation of JP2001000607A, published Jan. 9, 2001, in the name of Hakoda Shoji, assigned to Daio Shoji KK.

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