(under the class definition) Discharge devices which are provided with an electrode or other device for emitting positive ions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
163+, for discharge devices which have a liquid electrode (e.g., mercury), which is the source of positive ions during the operation of the device.
359.1+, for discharge devices provided with means to form and accelerate positive or negative ions.
567, for discharge devices which are provided with an envelope containing an atmosphere of gas or vapor, the gas or vapor being ionized in the operation of the device and therefore being a source of positive ions.
