(under subclass 112) Subject matter where there is a comparison between the desired position of an object and its actual position as measured and there is a control means which responds to the difference in these positions and attempts to minimize this difference.
SEE OR SEARCH THIS CLASS, SUBCLASS:
142, for an analog to or from digital converter as part of a control system.
SEE OR SEARCH CLASS
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
518+, for miscellaneous control systems.
340, Communications: Electrical, 825+, for selective control systems.
364, Electrical Computers and Data Processing Systems,
130+, for control systems using computers.
377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,
