73317503
Jul 6, 1981
Aug 17, 1982
Electrical Power Supplies for Welding Equipment, Electro-Mechanical Devices Controlled by Electro Servos for Welding Equipment, Electrical Motor Speed Drives for Welding Systems, Arc Voltage Controllers with Integrated Digital Systems, Electrical Switching Systems in Control Pendants for Controlling Weld Operations, Card Readers for Welding System Programs, Punched Tape Readers and Programmers for Weld Operations, Punched Card Readers and Programmers for Weld Operations, Welding Heads, Welding Wire Feeders for Welding Systems, Tube Welding Devices, Automatic Welders, Automatic Tubular and Pipe Welding Apparatus, Power Supplies for Automatic Welders, Gas Tungsten Arc Welders, Electric Power Supplies for Gas Tungsten Arc Welders, and, Computer Controlled Power Sources for Gas Tungsten Arc Welders
Electrical and Scientific Apparatus