(under subclass 443) Subject matter including circuitry to
modulate a signal derived from scanning a picture onto a carrier or including circuitry to demodulate the signal to reconstruct the picture.
SEE OR SEARCH CLASS
329, Demodulators, appropriate subclasses for demodulators, per se.
332, Modulators, appropriate subclasses for modulators, per se.
348, Television,
724, for transmitter circuitry in television systems including modulators and subclasses 726+ for receiver circuitry in television systems using demodulators.
455, Telecommunications, appropriate subclasses for circuitry to modulate or demodulate a carrier wave.
