(under subclass 153) Subject matter where the lamp or discharge device has a plurality of magnetic devices and/or having magnetic means for producing a plurality of distinct magnetic fields.
SEE OR SEARCH THIS CLASS, SUBCLASS:
421, 426, 427, 433, and 440, for cathode-ray tubes provided with magnetic means for deflecting a beam of electrons.
442, for cathode-ray tubes provided with means to focus a beam of electrons.
SEE OR SEARCH CLASS
315, Electric Lamp and Discharge Devices: Systems,
343, for systems for supplying electrical energy to discharge devices of the gas or vapor type having a plurality of electromagnetic means for influencing the discharge.
