The Famous XX® Trademark

The history of the trademark goes back to the early days of W.R. Case & Sons Cutlery Co., when the “XX” was used as a quality check system during the process of heat treating. When blades were put through the initial hardening furnace, an “X” was marked on the pan holding the blades. When the blades were returned to the oven for tempering, a second “X” was added. “XX” then, showed that each blade had been properly and fully treated. Today the “Case XX” trademark is a sign of distinction and quality which we proudly place on nearly every knife we make.