73179593
Jul 24, 1978
May 19, 1981
Measuring, Controlling, and Regulating Instruments, Systems and Apparatus-Namely, Controllers; Indicators; Recorders; Manual Control Stations; Hand-Automatic Transfer Stations; Gas Analyzers; Transmitters; Signal Conditioners; Combinations Thereof and Parts Therefor, Said Goods Being Used to Optimize the Combustion Process, More Specifically the Programed Fuel/Air Ratio, for Such Apparatus as Process Heaters, and Industrial and Utility Boilers
Electrical and Scientific Apparatus