Miller Weldmaster Corporation manufactures and innovates rotary hot air/hot wedge welding equipment. It was founded in 1972 and is based in Navarre, Ohio, where it employs over 90 people. Miller Weldmaster designs and builds welding machines for various industries, including tarpaulins, tents, pools, and ducting. It has built over 2,500 machines that are used in over 75 countries.