 Using human and animal cadaver research from earlier studies, the first artificial crash test dummy was an anthropomorphic dummy named "Sierra Sam".It was invented in 1949 by Samuel W. Alderson at his Alderson Research Labs (ARL) And Sierra Engineering Co. for the United States Air Force while conducting tests on aircraft ejection seats, pilot restraint harnesses, and aviation helmets.Alderson's early dummies and those of his competitors were fairly primitive, with no pelvic structure and little spinal articulation.