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| US4390995 | 3 Mar 1982 | 5 Jul 1983 | | Shock damping face guard strap for football helmets | | US5477565 | 2 Nov 1994 | 26 Dic 1995 | Wilson Hunt International | Batter's helmet with face guard | | US5571220 | 18 Oct 1995 | 5 Nov 1996 | | Protective headgear for baseball fielders | | US6708339 | 22 Abr 2003 | 23 Mar 2004 | | Sport helmet face guard | | US7954177 | 10 Ene 2007 | 7 Jun 2011 | Riddell, Inc. | Sports helmet |
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