H01J 23/02
Electrodes
Official title: Electrodes; Magnetic control means; Screens (associated with resonator or delay system H01J23/16)
H01J23/02 (Electrodes) appears on 605 US grants and 252 published applications in this corpus.
Search patents in H01J- Granted patents
- 605
- Published applications
- 252
- Assignees
- 211
- Inventors
- 900
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 11 | 0 |
| 1978 | 12 | 0 |
| 1979 | 10 | 0 |
| 1980 | 13 | 0 |
| 1981 | 14 | 0 |
| 1982 | 10 | 0 |
| 1983 | 14 | 0 |
| 1984 | 14 | 0 |
| 1985 | 21 | 0 |
| 1986 | 13 | 0 |
| 1987 | 17 | 0 |
| 1988 | 12 | 0 |
| 1989 | 22 | 0 |
| 1990 | 5 | 0 |
| 1991 | 9 | 0 |
| 1992 | 16 | 0 |
| 1993 | 5 | 0 |
| 1994 | 19 | 0 |
| 1995 | 14 | 0 |
| 1996 | 14 | 0 |
| 1997 | 14 | 0 |
| 1998 | 16 | 0 |
| 1999 | 18 | 0 |
| 2000 | 11 | 0 |
| 2001 | 13 | 4 |
| 2002 | 17 | 13 |
| 2003 | 15 | 12 |
| 2004 | 9 | 19 |
| 2005 | 13 | 9 |
| 2006 | 15 | 15 |
| 2007 | 8 | 12 |
| 2008 | 10 | 14 |
| 2009 | 10 | 6 |
| 2010 | 7 | 9 |
| 2011 | 6 | 14 |
| 2012 | 8 | 8 |
| 2013 | 9 | 6 |
| 2014 | 13 | 11 |
| 2015 | 13 | 9 |
| 2016 | 8 | 9 |
| 2017 | 20 | 7 |
| 2018 | 5 | 10 |
| 2019 | 14 | 10 |
| 2020 | 8 | 5 |
| 2021 | 6 | 9 |
| 2022 | 5 | 10 |
| 2023 | 8 | 7 |
| 2024 | 11 | 7 |
| 2025 | 5 | 11 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01J 23/06Electron or ion guns170
- H01J 23/04Cathodes168
- H01J 23/027Collectors126
- H01J 23/08Focusing arrangements117
- H01J 23/10Magnet systems for directing or deflecting the discharge along a desired path75
- H01J 23/11Means for reducing noise8
- H01J 23/09Electric systems for directing or deflecting the discharge along a desired path7
Recent patents
- Radiotherapy device and microwave source thereof12 May 2026US 12,623,089 B2Shanghai United Imaging Healthcare Co., Ltd.
- Magnetron10 Feb 2026US 12,548,729 B2Hitachi Power Solutions Co., Ltd.
- Composite electron beam vacuum tube13 Jan 2026US 12,525,418 B2The Boeing Company
- Magneto-electrostatic sensing, focusing, and steering of electron beams in vacuum electron devices4 Nov 2025US 12,463,000 B2Elve Inc.
- Traveling wave tube14 Oct 2025US 12,444,566 B2Raytheon Company
- Tungsten alloy wire, preparation method therefor and use thereof, and tungsten carbide alloy filament13 Aug 2026US 2026/0234761 A1Xiamen Honglu Tungsten Molybdenum Industry Co., Ltd.
- Cathode and manufacturing method thereof23 Jul 2026US 2026/0213111 A1Shanghai United Imaging Healthcare Co., Ltd.
- Electromagnetic radiation generation2 Jul 2026US 2026/0188529 A1United Kingdom Atomic Energy Authority
- Collector for a traveling wave tube and traveling wave tube with such a collector9 Apr 2026US 2026/0100322 A1Thales Deutschland GmbH
- Magneto-electrostatic sensing, focusing, and steering of electron beams in vacuum electron devices5 Feb 2026US 2026/0038760 A1Elve Inc.
Most cited
By later US patents
- Gyrotron having a quasi-optical mode converter225US 5,187,409 AKabushiki Kaisha Toshiba · 1993
- Article comprising enhanced nanotube emitter structure and process for fabricating article220US 6,250,984 B1Agere Systems Guardian Corp. · 2001
- Field emitting device comprising field-concentrating nanoconductor assembly and method for making the same102US 6,538,367 B1Agere Systems Inc. · 2003
- Carbon nanotube coated anode91US 6,645,628 B2The United States of America as represented by the Secretary of the Air Force · 2003
- Microwave vacuum tube device employing grid-modulated cold cathode source having nanotube emitters76US 6,297,592 B1Lucent Technologies Inc. · 2001