CPC Subgroup Additional Only
H01J 2201/2803 Characterised by the shape or size
Full Title
Electrodes common to discharge tubes > Heaters for thermionic cathodes > Characterised by the shape or size
14 direct subcodes
Child Classifications
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- H01J 2201/2807 Block
- H01J 2201/281 Cage-like construction
- H01J 2201/2817 Rods
- H01J 2201/2821 Envelope or cross-section
- H01J 2201/2835 Folded
- H01J 2201/2842 Conic
- H01J 2201/2846 Loop
- H01J 2201/285 Plurality of elements
- H01J 2201/2853 Serpentine
- H01J 2201/2864 Ribbon or bar
- H01J 2201/2867 Spiral or helix
- H01J 2201/2878 Thin film or film-like
- H01J 2201/2882 Variable winding density
- H01J 2201/2885 Twisted
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