Inventor of the covered welding electrode, Oscar Kjellberg, founded ESAB in a logical next step. ESAB is a leading manufacturer of welding consumables and equipment for both large and small jobs. Continuous research and development over the last 100 years has made esab a world leader in welding, cutting, and an international supplier of products, know-how, and services. None can compare with ESAB's continued efforts to improve existing methods and materials.