CPC Subgroup Additional Only
H01J 2329/0439 characterised by the emitter material
Full Title
Electron emission display panels, e.g. field emission display panels > Electrodes other than control electrodes > Cathode electrodes > Field emission cathodes > characterised by the emitter material
7 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- H01J 2329/0442 Metals or metal alloys
- H01J 2329/0444 Carbon types
- H01J 2329/0463 Semiconductor materials
- H01J 2329/0465 Carbides
- H01J 2329/0468 Nitrides
- H01J 2329/0471 Borides
- H01J 2329/0473 Oxides
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