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The two largest football helmet manufacturers in the United States are once again facing off in court over patent infringement allegations. Schutt Sports, of southern Litchfield State, filed a federal lawsuit Thursday against Rosemont-based Riddell for football helmet technologies. The complaint identifies a number of models, including Riddell’s SpeedFlex, Revolution Speed ​​and Revolution Speed ​​Classic, …

NFL games can look very different this season. Seattle-based startup Vicis has been working since 2013 on a new type of football helmet designed to yield to contact. The result is a thud, instead of the loud crack players and fans are used to hearing. The softer impact means less head trauma, and the theory …