IPC Main Group
H01J 29/00 Details of cathode-ray tubes or of electron-beam tubes of the types covered by group
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
9 direct subcodes
Child Classifications
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- H01J 29/02 Electrodes; Screens; Mounting, supporting, spacing, or insulating thereof
- H01J 29/46 Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J 29/84 Arrangements for removing or diverting unwanted particles, e.g. for negative ions or fringing electrons; Arrangements for velocity or mass selection
- H01J 29/86 Vessels; Containers; Vacuum locks
- H01J 29/9 Leading-in arrangements; Seals therefor
- H01J 29/92 Means forming part of the tube for the purpose of providing electrical connection to it
- H01J 29/94 Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering
- H01J 29/96 One or more circuit elements structurally associated with the tube
- H01J 29/98 Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for