| http://www.w3.org/ns/prov#value | - Patent US7109857 - Brake light warning system for safety helmets and method of operation - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsA brake light warning system for safety helmets includes a transmitter module adapted for mounting to a vehicle, such as a motorcycle, and a receiver module adapted for mounting to a safety helmet.
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