Linear actuators; hydraulic and pneumatic actuators for valves; hydraulic valve actuators; hydraulic and pneumatic rotary and linear actuators; hydraulic and pneumatic mechanical linear actuators; valves being parts of machines; servo-valves; magnetic valve positioners being parts of machines, namely, magnetic positioning apparatus for use in severe industrial processes being oil, gas, chemical, nuclear, power and metal refining and production systems; speed governors for machines, engines and motors; regulators as parts of machines that are used in severe industrial processes being oil, gas, chemical, nuclear, power and metal refining and production systems; pressure controllers in the nature of pneumatic positioners being a part of a valve being parts of machines used in severe industrial processes being oil, gas, chemical, nuclear, power and metal refining and production systems; pressure regulators in the form of pneumatic positioners as part of a control valve being parts of machines which are used in severe industrial processes being oil, gas, chemical, nuclear, power and metal refining and production systems

Electronic control systems being a digital valve positioner as part of automatic valves which are used in severe industrial processes being oil, gas, chemical, nuclear, power and metal refining and production systems; electronic controllers in the form of a digital positioner used to control the position of valves; electronic controllers as part of actuators for controlling valves; electronic regulators in the nature of valve controllers; simulators for testing the performance of electric actuators, frequency converters, positioner sensors for use with valves, limit switches for monitoring, controlling, and switching hydraulic or pneumatic systems, electronic positioners as parts of valves or machines, digital positioners as parts of machines; measuring, detecting and monitoring instruments, namely, digital-pneumatic valve controllers, electronic; pressure and temperature indicators and electronic controllers for determining and measuring flow, pressure, temperature, gases, fluids and liquids; converters, electric; sensors for determining position of valves used in severe industrial processes being oil, gas, chemical, nuclear, power and metal refining and production systems but not for use in conjunction with computers; circuit breakers; limit switches; electronic logic circuits; integrated electronic circuits; digital pressure and temperature indicators for valves; data recorded electronically in the nature of recorded computer programs, for configuring, calibrating, controlling and monitoring valve controllers; computer software for configuring, calibrating, controlling and monitoring valve controllers; electronic motion controllers as part of positioners for controlling actuators and valves