CPC Main Group
H01J 37/00 Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof (H01J33/00, H01J40/00, H01J41/00, H01J47/00, H01J49/00 take precedence)
Filing statistics
CPC H01J 37/00 belongs to the parent subclass H01J, which 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
5 direct subcodes
Child Classifications
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- H01J 37/02 Details
- H01J 37/252 Tubes for spot-analysing by electron or ion beams; Microanalysers
- H01J 37/26 Electron or ion microscopes; Electron or ion diffraction tubes
- H01J 37/30 Electron-beam or ion-beam tubes for localised treatment of objects
- H01J 37/32 Gas-filled discharge tubes (heating by discharge H05B)
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