(under the class definition) Subject matter having three or more discharge electrodes, the electrodes being connected in series relation in the discharge current circuit.
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8, for systems including two or more consumable electrode discharge devices connected in series relation in the circuit.
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313, Electric Lamp and Discharge Devices,
306, and the subclasses specified in the Notes thereto for miscellaneous discharge devices which have three or more discharge electrodes which are arranged so that the discharge electrodes are in series relationship with each other.
