being gas discharge devices (G09F9/302 takes precedence; gas discharge panels comprising a number of discharge gaps per se H01J17/49)

Full Title

Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) > in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) > being gas discharge devices (G09F9/302 takes precedence; gas discharge panels comprising a number of discharge gaps per se H01J17/49)