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IPC Main Group
H01J 3/00

Details of electron-optical or ion-optical arrangements common to two or more basic types of discharge tubes or lamps

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC ELEMENTS
Subclass:
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

Filing statistics

IPC H01J 3/00 belongs to the parent subclass H01J, which recorded 110,789 patent applications worldwide between 2013 and 2023. Annual filings grew from 9,068 in 2013 to 10,705 in 2023 (+18%), peaking at 11,872 applications in 2021. The most active applicants in class H01 are TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY (43,574 applications), SAMSUNG ELECTRONICS COMPANY (42,206 applications) and LG CHEM (21,383 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

ELECTRON sources in discharge tubes; ELECTRON gunselectron or ion GUNSgenerating or handling ION(S) in discharge tubesION(S) guns

12 direct subcodes

Child Classifications

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  • H01J 3/02 Electron guns
  • H01J 3/04 Ion guns
  • H01J 3/06 two or more guns being arranged in a single vacuum space, e.g. for plural-ray tubes
  • H01J 3/07 Arrangements for controlling convergence of a plurality of beams
  • H01J 3/08 Arrangements for controlling intensity of ray or beam
  • H01J 3/1 Arrangements for centering ray or beam
  • H01J 3/12 Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
  • H01J 3/36 Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration
  • H01J 3/38 Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
  • H01J 3/4 Arrangements for removing or diverting unwanted particles, e.g. for negative ions or fringing electrons; Arrangements for velocity or mass selection

Top Applicants

Top 10 applicants by patent filingsfor class H01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
  2. SAMSUNG ELECTRONICS COMPANY KR 42,206
  3. LG CHEM KR 21,383
  4. APPLIED MATERIALS US 20,441
  5. LG ENERGY SOLUTION KR 20,279
  6. SAMSUNG DISPLAY KR 19,725
  7. CHINESE ACADEMY OF SCIENCES 19,400
  8. TOYOTA MOTOR CORPORATION 18,819
  9. SGCC(STATE GRID CORPORATION OF CHINA) 18,082
  10. TOKYO ELECTRON JP 17,634