During 1932, James Gregory and Raymond Quilter founded another pioneering parachute manufacturer, "GQ Parachutes". By the end of the 1930s, both companies had become well established major suppliers of emergency escape parachutes to many air forces around the world. During 1940, GQ and Irvin collaborated on the X-Type parachute assembly, which provided a safe and reliable static line assembly for paratroopers. This model was mass-produced throughout the rest of the Second World War, being used by both aircrews and airborne forces alike, and for several decades after the war's end. One high-profile example of its use was during the D-Day Landings, the delivery of the advance airborne units over Normandy made extensive use of the X-Type parachute assembly.