(under subclass 30) Subject matter wherein the resonance indicator is of the cathode ray tube.
SEE OR SEARCH CLASS
313, Electric Lamp and Discharge Devices,
364+, for cathode-ray tubes.
315, Electric Lamp and Discharge Devices: Systems,
1+, for cathode- ray tube systems in general. 347, Incremental Printing of Symbolic Information,
121+, for electrostatic recorder using electron beam with an air tight envelope to create a charged pattern, and subclasses 226+ for radiation marking using cathode- ray tube.
348, Television,
569+, for television receiver tuners having a tuning indicator, wherein a cathode-ray tube including the picture display tube may be utilized to indicate tuning.
