Electrodes; Screens; Mounting, supporting, spacing, or insulating thereof

Introduced: September 1968

Last revised: January 2006

Full Title

Details of cathode-ray tubes or of electron-beam tubes of the types covered by group > Electrodes; Screens; Mounting, supporting, spacing, or insulating thereof

Classification Context

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

Filing statistics

IPC H01J 29/02 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

4 direct subcodes

Child Classifications

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H01J 29/04 Cathodes
H01J 29/06 Screens for shielding; Masks interposed in the electron stream
H01J 29/08 Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up, converted or stored, e.g. backing-plates for storage tubes or electrodes for collecting secondary electrons
H01J 29/1 Screens on, or from, which an image or pattern is formed, picked-up, converted, or stored

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