A vehicle safety system requiring seat belt use including a car seat positioned within the vehicle. The car seat has a seat portion and a back portion. A seat belt is coupled with respect to the car seat. The seat belt is comprised of a shoulder harness and a waist belt together joined with a belt buckle....http://www.google.fr/patents/US6540040?utm_source=gb-gplus-shareBrevet US6540040 - Vehicle safety system requiring seat belt use
