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Patent 6,553,580 Awarded for “Method of Protecting a Helmet and Interrupting Airflow” which reduces motorcycle buffeting due to turbulence.
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April 2003: Dale Henson, of San Jose CA, invented a simple add-on device that breaks up the laminar air flow over a helmet through shapes that act as both a spoiler and a vortex generator.  Features normally associated with aircraft to improve stall characteristics are now used to reduce helmet buffeting due to flow around windshields.