(under subclass 681) Subject matter wherein at least one electronic device is a vacuum tube in which its electron beam can be focused to a small cross section on a luminescent screen and can be varied in position and intensity to produce a visible pattern combined with housing or mounting arrangement.
(1) Note. This subclass provides for only nominal recitation of a CRT.
SEE OR SEARCH CLASS
204, Chemistry: Electrical and Wave Energy,
192.1+, for cathode-ray tube coating, forming, or etching by sputtering.
312, Supports: Cabinet Structure, appropriate subclass for cathode-ray tube furniture without cathode-ray tube.
313, Electric Lamp and Discharge Devices,
364+, for cathode-ray tube, per se. 315, Electric Lamp and Discharge Device: Systems,
1+, for cathode-ray tube circuits, per se.
324, Electricity: Measuring and Testing,
121+, for measuring, testing, or sensing using a cathode-ray tube.
340, Communications: Electrical,
720+, for cathode-ray tube display system having structural or functional details of display system.
347, Incremental Printing of Symbolic Information,
226+, for radiation marking using cathode-ray tube.
348, Television,
825+, for functional detail of a cathode-ray tube combined with support equipment.
358, Facsimile, 485, for facsimile having cathode-ray tube scanning.
386, Television Signal Processing for Dynamic Recording or Reproducing,
42+, and 128+ for photos:graphic television recording, particularly subclass 130 for cathode-ray tube.
430, Radiation Imagery Chemistry: Process, Composition, or Product Thereof,
23+, for process of producing cathode-ray tube.
434, Education and Demonstration,
307, for cathode ray screen display and audio means in education and subclass 323 for cathode ray screen display included in examining means of question or problem eliciting response.
445, Electric Lamp or Space Discharge Component or Device Manufacturing,
36+, for manufacturing process of cathode-ray tube.
