(under subclass 2) Subject matter in which the device includes structure which peculiarly adapts or restricts its use to radio-frequency or microwave frequency conductive circuitry.
(1) Note. The switching devices found in this and indented subclass 5 below comprise contact means whereby a continuous physical path is established in one or more conductors of the circuit to be controlled.
SEE OR SEARCH CLASS
333, Wave Transmission Lines and Networks, for high frequency wave transmission line and network switching systems, particularly
2+, for automatically controlled plural channel systems, subclasses 101+ for branched circuit switching, subclass 13 for resonator breakdown systems (e.g., TR or RT systems), subclass 15 for pilot line controlled systems; subclass 16 for pilot current controlled systems, subclasses 17.1+ for automatically controlled systems and subclasses 245+ for wave transmission components that may include switches.
343, Communications: Radio Wave Antennas,
777, for plural wave guide antennas with lobe switching and subclasses 876 and 904 for antennas with switch. 455, Telecommunications,
78+, for so-called T. R. switches connecting first the transmitter and then the receiver selectively to an antenna.
