H01J 25/54
Having only one cavity or other resonator
Official title: having only one cavity or other resonator, e.g. neutrode tubes
H01J25/54 (Having only one cavity or other resonator) appears on 19 US grants and 8 published applications in this corpus.
Search patents in H01J- Granted patents
- 19
- Published applications
- 8
- Assignees
- 11
- Inventors
- 30
- Latest grant
- 9 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 2 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- RF source protection9 Sep 2025US 12,414,221 B2Elekta Limited
- Simultaneous wireless information and power transfer device and method based on the modulation of power supply ripple of magnetron11 Jun 2024US 12,009,676 B2Sichuan University
- Magnetron having enhanced harmonics shielding performance22 Oct 2019US 10,453,641 B2LG Electronics Inc.
- Apparatus for generating thermodynamically cold microwave plasma17 May 2016US 9,343,271 B2
- Terahertz (THz) reverse micromagnetron7 Jan 2014US 8,624,497 B1The United States of America as represented by the Secretary of the Navy
- Rf source protection23 Nov 2023US 2023/0380049 A1Elekta Limited
- Simultaneous wireless information and power transfer device and method based on the modulation of power supply ripple of magnetron2 Feb 2023US 2023/0030516 A1Sichuan University
- Magnetron having enhanced harmonics shielding performance15 Aug 2019US 2019/0252147 A1LG Electronics Inc.
- Apparatus for generating thermodynamically cold microwave plasma11 Dec 2014US 2014/0361689 A1
- Microwave signal generator9 Apr 2009US 2009/0091395 A1LG Electronics Inc.
Most cited
By later US patents
- Coaxial magnetron having cavity walls vibrated by tuning fork12US 4,518,932 AEnglish Electric Valve Company Limited · 1985
- Coaxial magnetron using the TE.sub.111 mode10US 4,588,965 AVarian Associates, Inc. · 1986
- Phased array source of electromagnetic radiation7US 6,724,146 B2Raytheon Company · 2004
- Microwave signal generator6US 7,863,988 B2LG Electronics Inc. · 2011
- Tunable magnetron of the coaxial-vacuum type5US 4,531,104 ALitton Systems, Inc. · 1985