H01J 2235/062
Cold cathodes
H01J2235/062 (Cold cathodes) appears on 141 US grants and 168 published applications in this corpus.
Search patents in H01J- Granted patents
- 141
- Published applications
- 168
- Assignees
- 102
- Inventors
- 350
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 3 |
| 2005 | 1 | 2 |
| 2006 | 3 | 4 |
| 2007 | 2 | 8 |
| 2008 | 6 | 4 |
| 2009 | 3 | 12 |
| 2010 | 8 | 13 |
| 2011 | 10 | 22 |
| 2012 | 9 | 8 |
| 2013 | 13 | 3 |
| 2014 | 10 | 6 |
| 2015 | 5 | 6 |
| 2016 | 3 | 4 |
| 2017 | 5 | 5 |
| 2018 | 3 | 4 |
| 2019 | 6 | 10 |
| 2020 | 11 | 9 |
| 2021 | 7 | 8 |
| 2022 | 7 | 5 |
| 2023 | 9 | 8 |
| 2024 | 6 | 5 |
| 2025 | 6 | 10 |
| 2026 | 6 | 7 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Emitter and field emission assembly including the same7 Jul 2026US 12,676,276 B2AweXome Ray, Inc.
- Systems and methods for fabricating silicon die stacks for electron emitter array chips26 May 2026US 12,640,326 B2
- X-ray tube with a cooled gate electrode26 May 2026US 12,640,327 B2Siemens Healthineers AG
- Method for producing an anode for a cold cathode x-ray source26 May 2026US 12,640,328 B2Thales
- Field emission X-ray source device21 Apr 2026US 12,609,262 B2VATECH Co., Ltd.
- X-ray devices with nanotube emitters and methods of forming8 Oct 2026US 2026/0311951 A1Varex Imaging Corporation
- X-ray source with multiple grids2 Jul 2026US 2026/0190208 A1Varex Imaging Corporation
- X-ray electron emission control device9 Apr 2026US 2026/0101426 A1LG Electronics Inc.
- Electron emission source including high-density carbon structure-based film, method for manufacturing the same, and x-ray tube using the same2 Apr 2026US 2026/0094782 A1Lmx Co., Ltd.
- Multi-directional connection hub and cold cathode x-ray tube that can easily change its characteristics and its connection method19 Mar 2026US 2026/0081090 A1Electronics and Telecommunications Research Institute
Most cited
By later US patents
- Tetrahedron beam computed tomography318US 7,760,849 B2William Beaumont Hospital · 2010
- Field emitter based electron source with minimized beam emittance growth118US 7,801,277 B2General Electric Company · 2010
- Devices and methods for producing multiple x-ray beams from multiple locations92US 6,980,627 B2Xintek, Inc. · 2005
- Method and apparatus for controlling electron beam current57US 7,085,351 B2The University of North Carolina at Chapel Hill · 2006
- Multi X-ray generating apparatus and X-ray imaging apparatus56US 7,991,120 B2Canon Kabushiki Kaisha · 2011