(under subclass 801) Subject matter utilized for filtering electrical signals by computation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
300+, for digital filtering.
SEE OR SEARCH CLASS
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
552+, for miscellaneous unwanted signal suppression utilizing an active filter circuit not performing an arithmetic calculation.
333, Wave Transmission Lines and Networks,
18, for filters used in automatically controlled equalizer or delay networks; subclass 28 for analog filters in equalizer coupling networks and subclasses 167+ for analog type transversal filter coupling networks. 375, Pulse or Digital Communications,
229+, and 285 for filtering techniques used in distortion or noise prevention or correction means for modulated carrier wave communication systems.
