(under subclass 36) Subject matter wherein the resonance indicator lamp is of the gaseous glow discharge tube type, such as, for example, a neon lamp.
SEE OR SEARCH CLASS
313, Electric Lamp and Discharge Devices,
567+, for electric lamp and discharge devices which include an envelope and an atmosphere of gas or vapor within the envelope. See also the Search Notes under this subclass for an additional field of search relating to gaseous discharge tubes and circuits.