H01J ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H)
Description
H01J covers electric discharge tubes and lamps that generate light or other radiation through electrical discharge in gases, vapors, or vacuums. This includes cathode ray tubes, fluorescent lamps, gas-filled tubes (such as neon and xenon tubes), vacuum tubes, X-ray tubes, and plasma display devices. The classification encompasses both the structural design of discharge devices and their operational principles, including electrode configurations, gas fills, and envelope materials. Closely related technologies in gas-filled devices may overlap with semiconductor light sources (H01L), which are classified separately.
Filing statistics
CPC subclass H01J recorded 135,587 patent applications worldwide between 2013 and 2023. Annual filings grew from 10,933 in 2013 to 11,751 in 2023 (+7%), peaking at 14,583 applications in 2021. The most active applicants in class H01 are SAMSUNG ELECTRONICS COMPANY (37,897 applications), TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY (36,116 applications) and APPLIED MATERIALS (21,640 applications).
Source: EPO PATSTAT, worldwide filings
43 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- H01J 1/00 Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps (details of electron-optical or ion-optical arrangements H01J3/00)
- H01J 11/00 Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP] (circuits or methods for driving PDPs G09G3/28); Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J 13/00 Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
- H01J 15/00 Gas-filled discharge tubes with gaseous cathodes, e.g. plasma cathode
- H01J 17/00 Gas-filled discharge tubes with solid cathode (H01J25/00, H01J27/00, H01J31/00 - H01J41/00 take precedence; gas filled spark gaps H01T; Marx converters H02M7/26)
- H01J 19/00 Details of vacuum tubes of the types covered by group H01J21/00
- H01J 21/00 Vacuum tubes (H01J25/00, H01J31/00 - H01J40/00, H01J43/00, H01J47/00, H01J49/00 take precedence; details of vacuum tubes H01J19/00)
- H01J 2201/00 Electrodes common to discharge tubes
- H01J 2203/00 Electron or ion optical arrangements common to discharge tubes or lamps
- H01J 2209/00 Apparatus and processes for manufacture of discharge tubes
- H01J 2211/00 Plasma display panels with alternate current induction of the discharge, e.g. AC-PDPs
- H01J 2217/00 Gas-filled discharge tubes
- H01J 2223/00 Details of transit-time tubes of the types covered by group H01J2225/00
- H01J 2225/00 Transit-time tubes, e.g. Klystrons, travelling-wave tubes, magnetrons
- H01J 2229/00 Details of cathode ray tubes or electron beam tubes (H01J2329/00 takes precedence)
- H01J 2231/00 Cathode ray tubes or electron beam tubes (H01J2329/00 takes precedence)
- H01J 2235/00 X-ray tubes
- H01J 2237/00 Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J 2261/00 Gas- or vapour-discharge lamps
- H01J 23/00 Details of transit-time tubes of the types covered by group H01J25/00
Top Applicants
Top 10 applicants by patent filingsfor class H01, 2013–2023, worldwide · Source: EPO PATSTAT
- SAMSUNG ELECTRONICS COMPANY KR 37,897
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 36,116
- APPLIED MATERIALS US 21,640
- LG ENERGY SOLUTION KR 20,770
- LG CHEM KR 19,835
- TOKYO ELECTRON JP 18,519
- ROBERT BOSCH DE 14,595
- INTEL CORPORATION US 13,580
- MURATA MANUFACTURING COMPANY JP 12,151
- SAMSUNG SDI COMPANY KR 12,080