(under subclass 313) Subject matter including frequency modifying or conversion means combined with other means whereby any unwanted or parasitical oscillations originating in the receiver circuitry are eliminated or whereby any oscillations occurring in the receiver circuitry are prevented from being reradiated from the receiving antenna.
SEE OR SEARCH CLASS
174, Electricity: Conductors and Insulators, for electric shielding structures in general.
307, Electrical Transmission or Interconnection Systems,
89, for anti-induction systems in general.
329, Demodulators, appropriate subclasses for demodulators having radiation reducing means.
343, Communications: Radio Wave Antennas,
5+, for radar receivers with reradiation prevention means; and subclasses 100+ for directive systems which may have radiation control.
