ข้อมูลSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES (regulating the timing or recurrence frequency of pulses in radar or radio navigation systems G01S; regulation of current or voltage, specially adapted for use in electronic time-pieces G04G0019020000; closed-loop systems for regulating non-electric variables by electric means G05D; regulating power supply of digital computers G06F0001260000; for obtaining desired operating characteristics of electromagnets with armatures H01F0007180000; regulating electric power distribution networks H02J; regulating the charging of batteries H02J0007000000; regulating of the output of static converters, e.g. switching regulators, H02M; regulation of the output of electric generators H02N, H02P0009000000; controlling transformers, reactors or choke coils H02P0013000000; regulating frequency response, gain, maximum output, amplitude or bandwidth of amplifiers H03G; regulating tuning of resonant circuits H03J; controlling generators of electronic oscillations or pulses H03L; regulating characteristics of transmission lines H04B; controlling electric light sources H05B0037020000, H05B0039040000, H05B0041360000; electric control of X-ray apparatus H05G0001300000)

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