However, the first modern three point seat belt (the so-called CIR-Griswold restraint) used in most consumer vehicles today was patented in 1955 U.S. Patent 2,710,649 by the Americans Roger W. Griswold and Hugh DeHaven. Fatal car accidents were rapidly increasing in Sweden during the 1950s. When a study at Vattenfall of accidents among employees revealed that the majority of casualties came from car accidents, two Vattenfall engineers (Bengt Odelgard and Per-Olof Weman) started to develop the safety belt. Their work set the standard for safety belts in Swedish cars and was presented to Swedish manufacturer Volvoin the late 1950s.