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Home › Method of selecting kind of size of a helmet and shape of a pad, method of adjusting helmet size by using the selection method, and head size measuring tool used in aforesaid selection method

Method of selecting kind of size of a helmet and shape of a pad, method of adjusting helmet size by using the selection method, and head size measuring tool used in aforesaid selection method

US Patent 9182208 · Granted Nov 10, 2015

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