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
Top Applicants
Top 10 applicants by patent filingsfor class H01, 2013–2023, worldwide · Source: EPO PATSTAT
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
- SAMSUNG ELECTRONICS COMPANY KR 42,206
- LG CHEM KR 21,383
- APPLIED MATERIALS US 20,441
- LG ENERGY SOLUTION KR 20,279
- SAMSUNG DISPLAY KR 19,725
- CHINESE ACADEMY OF SCIENCES 19,400
- TOYOTA MOTOR CORPORATION 18,819
- SGCC(STATE GRID CORPORATION OF CHINA) 18,082
- TOKYO ELECTRON JP 17,634