(under the class definition) Subject matter including means to transmit an interference signal to interfere with a selected signal so as to prevent the intelligible reception of the selected signal.
(1) Note. The combination of an interference transmitter with a receiver to select the frequency of the incoming signal it is desired to jam or block, and control means to tune the transmitter to said frequency, is classified in this subclass when the receiver serves solely to determine the frequency of the incoming signal and to control the transmitter. If the receiver portion of the combination is complete (reproduces the intelligence received) the combination is a transceiver and is classified in this class (455), subclasses 73+.
(2) Note. Antijamming devices or methods are not classified here, but are found in subclasses 296+.
SEE OR SEARCH CLASS
343, Communications: Radio Wave Antennas,
18, for jamming or radar transmissions.
380, Cryptography,
6+, for concealment of information by masking of an information bearing signal.
