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Joseph M. Reeves created a protective device for the head for Army-Navy game. Crude leather helmet
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Created a "head harness" to prevent cauliflower ear. Three thick leather straps forming close fit around head
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Fabricated leather, more padding and flaps, ear holes for on-field communication
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Suspension: to "cradle" skull away from leather shell, straps of fabric formed a pattern inside helmet to absorb and distribute impact better, ventilation
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rubber-covered wire mask (protection)
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plastic football helmet created by John T. Riddell was stronger, lighter, longer lasting first chin strap to rest on chin instead of neck.
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Tear drop shape made legal
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Single bar design, single wave radio; improved safety and onfield communication
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energy-absorbing, "microfit" helmets, pumped up with fluid or air (called air bladders) for secure fit and to help blunt force hits
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four-point chin straps held helmet in place (safety)
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polycarbonate alloy plastic helmets and vinyl coated steel alloy (durability, long-lasting)
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more spherical design for helmet called Revolution, reduced incidence of concussion 31%
