H01J 2229/48
Electron guns
H01J2229/48 (Electron guns) appears on 368 US grants and 111 published applications in this corpus.
Search patents in H01J- Granted patents
- 368
- Published applications
- 111
- Assignees
- 84
- Inventors
- 440
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 13 | 0 |
| 1987 | 10 | 0 |
| 1988 | 14 | 0 |
| 1989 | 17 | 0 |
| 1990 | 14 | 0 |
| 1991 | 13 | 0 |
| 1992 | 9 | 0 |
| 1993 | 8 | 0 |
| 1994 | 4 | 0 |
| 1995 | 9 | 0 |
| 1996 | 15 | 0 |
| 1997 | 14 | 0 |
| 1998 | 27 | 0 |
| 1999 | 19 | 0 |
| 2000 | 21 | 0 |
| 2001 | 20 | 12 |
| 2002 | 36 | 33 |
| 2003 | 29 | 19 |
| 2004 | 23 | 12 |
| 2005 | 6 | 8 |
| 2006 | 12 | 5 |
| 2007 | 2 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 4 |
| 2016 | 3 | 2 |
| 2017 | 2 | 4 |
| 2018 | 3 | 1 |
| 2019 | 1 | 0 |
| 2020 | 3 | 0 |
| 2021 | 0 | 2 |
| 2022 | 2 | 0 |
| 2023 | 1 | 2 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01J 2229/4844Characterised by beam passing apertures or combinationsIndexing code160
- H01J 2229/4834Electrical arrangements coupled to electrodesIndexing code147
- H01J 2229/4824Constructional arrangements of electrodesIndexing code56
- H01J 2229/4803ElectrodesIndexing code42
- H01J 2229/50Plurality of guns or beamsIndexing code34
Recent patents
- Extraction grid24 Feb 2026US 12,562,331 B2BüHler Alzenau GmbH
- Extreme-ultraviolet light source device using electron beams21 Oct 2025US 12,451,316 B2Worldbeam Solution Co., Ltd.
- Precision alignment system for millimeter wave sources2 May 2023US 11,640,893 B1Dymenso LLC
- Field emission device24 May 2022US 11,342,153 B2Electronics and Telecommunications Research Institute
- Method of operating a charged particle gun, charged particle gun, and charged particle beam device25 Jan 2022US 11,232,924 B2ICT Integrated Circuit Testing Gesellschaft für Halbleiterprüftechnik mbH
- Insulator, Charged Particle Gun, and Charged Particle Beam Device6 Aug 2026US 2026/0229440 A1Hitachi High-Tech Corporation
- Processor System, Correction Method, and Correction Program4 Jul 2024US 2024/0222064 A1Hitachi High-Tech Corporation
- Extraction grid18 Jan 2024US 2024/0021399 A1BüHler Alzenau GmbH
- Precision Alignment System for Millimeter Wave Sources18 May 2023US 2023/0154717 A1Dymenso LLC
- Extreme-ultraviolet light source device using electron beams20 Apr 2023US 2023/0122253 A1University-Industry Cooperation Group of Kyung Hee University
Most cited
By later US patents
- CRT with field-emission cathode75US 4,178,531 ARCA Corporation · 1979
- Cathode ray tube apparatus having focusing grids with horizontally and vertically oblong through holes35US 4,814,670 AMatsushita Electronics Corporation · 1989
- Cathode ray tube apparatus with quadrupole electrode structure35US 4,886,999 AMitsubishi Denki Kabushiki Kaishi · 1989
- In-line electron gun33US 5,061,881 AMatsushita Electronics Corporation · 1991
- Electron gun system with dynamic convergence control29US 5,027,043 AZenith Electronics Corporation · 1991