(under the class definition) Subject matter wherein the amplifying device is of the vacuum tube type including means for magnetically influencing the electric discharge in the device, and not provided for above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
41, for amplifiers having a gas or vapor type amplifying device including those with magnetic means to deflect the ionized stream of gas or vapor particles.
42, for amplifiers having secondary emission tube amplifying devices including those with magnetic means.
43, for traveling wave type tube amplifiers which may include magnetic means.
44+, for electron beam tube amplifying devices which may include magnetic means.
SEE OR SEARCH CLASS 313, Electric Lamp and Discharge Devices,
153+, for discharge device combined with a magnetic device. See the Notes and search notes of Class 313.
315, Electric Lamp and Discharge Devices: Systems,
39.51+, for magnetrons. See the Notes and search Notes and search Notes of Class 315.
329, Demodulators,
322, for a magnetron type frequency modulator and subclass 354 for a magnetron type amplitude modulator.
