H01J11/00	Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP] (circuits or methods for driving PDPs G09G 3/28); Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel [1, 2006.01, 2012.01]
	Note(s) When classifying in this group, classification is made in all appropriate places [2012.01]In this group, the following term is used with the meaning indicated: "main electrode" means any of a sustain electrode, scan electrode or address electrode