Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up, converted, or stored

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Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps (details of electron-optical or ion-optical arrangements H01J3/00) > Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up, converted, or stored