Athletic mouth guard

作者: Quinton A. Schaefer

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摘要: An athletic mouth guard useful in contact sports for protecting an athlete's teeth comprising a U-shaped double trough piece secured to connecting strap adapted be attached the face on helmet. The distal end of contains oblong opening whereby looped connection can made with bar by passing through and pulling loop into tight engagement guard.

参考文章(2)
James B Poindexter, Tooth guard and jaw protector ,(1937)
Cathcart Jack F, Moffett Fred P, Universal mouth protector ,(1958)